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Finding the Fourth Proportional to 70,320.92, 97,042.56 and 38,489.72

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Solution

The fourth proportional to 70,320.92, 97,042.56 and 38,489.72 is: 53,115.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,320.92 : 97,042.56 = 38,489.72 : x
  2. Step 2: Convert to fraction form
    70,320.92/97,042.56 = 38,489.72/x
  3. Step 3: Cross multiply
    70,320.92x = 97,042.56 × 38,489.72
  4. Step 4: Simplify right side
    70,320.92x = 3,735,140,962.48
  5. Step 5: Solve for x
    x = 3,735,140,962.48/70,320.92
  6. Step 6: Final answer
    x = 53,115.64

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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.