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Finding the Fourth Proportional to 70,320.78, 97,042.51 and 38,489.40

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Solution

The fourth proportional to 70,320.78, 97,042.51 and 38,489.40 is: 53,115.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,320.78 : 97,042.51 = 38,489.40 : x
  2. Step 2: Convert to fraction form
    70,320.78/97,042.51 = 38,489.40/x
  3. Step 3: Cross multiply
    70,320.78x = 97,042.51 × 38,489.40
  4. Step 4: Simplify right side
    70,320.78x = 3,735,107,402.96
  5. Step 5: Solve for x
    x = 3,735,107,402.96/70,320.78
  6. Step 6: Final answer
    x = 53,115.28

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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.