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Finding the Fourth Proportional to 79,587.20, 109,766.40 and 70,006.40

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Solution

The fourth proportional to 79,587.20, 109,766.40 and 70,006.40 is: 96,552.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,587.20 : 109,766.40 = 70,006.40 : x
  2. Step 2: Convert to fraction form
    79,587.20/109,766.40 = 70,006.40/x
  3. Step 3: Cross multiply
    79,587.20x = 109,766.40 × 70,006.40
  4. Step 4: Simplify right side
    79,587.20x = 7,684,350,504.96
  5. Step 5: Solve for x
    x = 7,684,350,504.96/79,587.20
  6. Step 6: Final answer
    x = 96,552.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.