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Finding the Fourth Proportional to 70,920.59, 97,874.78 and 39,089.40

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Solution

The fourth proportional to 70,920.59, 97,874.78 and 39,089.40 is: 53,945.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,920.59 : 97,874.78 = 39,089.40 : x
  2. Step 2: Convert to fraction form
    70,920.59/97,874.78 = 39,089.40/x
  3. Step 3: Cross multiply
    70,920.59x = 97,874.78 × 39,089.40
  4. Step 4: Simplify right side
    70,920.59x = 3,825,866,229.89
  5. Step 5: Solve for x
    x = 3,825,866,229.89/70,920.59
  6. Step 6: Final answer
    x = 53,945.78

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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.