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Finding the Fourth Proportional to 70,274.32, 105,151.86 and 42,211.40

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Solution

The fourth proportional to 70,274.32, 105,151.86 and 42,211.40 is: 63,161.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,274.32 : 105,151.86 = 42,211.40 : x
  2. Step 2: Convert to fraction form
    70,274.32/105,151.86 = 42,211.40/x
  3. Step 3: Cross multiply
    70,274.32x = 105,151.86 × 42,211.40
  4. Step 4: Simplify right side
    70,274.32x = 4,438,607,223.20
  5. Step 5: Solve for x
    x = 4,438,607,223.20/70,274.32
  6. Step 6: Final answer
    x = 63,161.16

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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.