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Finding the Fourth Proportional to 70,660,000.90, 105,990,001.35 and 40,426,912.90

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Solution

The fourth proportional to 70,660,000.90, 105,990,001.35 and 40,426,912.90 is: 60,640,369.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,660,000.90 : 105,990,001.35 = 40,426,912.90 : x
  2. Step 2: Convert to fraction form
    70,660,000.90/105,990,001.35 = 40,426,912.90/x
  3. Step 3: Cross multiply
    70,660,000.90x = 105,990,001.35 × 40,426,912.90
  4. Step 4: Simplify right side
    70,660,000.90x = 4,284,848,552,847,332
  5. Step 5: Solve for x
    x = 4,284,848,552,847,332/70,660,000.90
  6. Step 6: Final answer
    x = 60,640,369.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.