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Finding the Fourth Proportional to 60,618.40, 90,690 and 39,882.40

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Solution

The fourth proportional to 60,618.40, 90,690 and 39,882.40 is: 59,667.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,618.40 : 90,690 = 39,882.40 : x
  2. Step 2: Convert to fraction form
    60,618.40/90,690 = 39,882.40/x
  3. Step 3: Cross multiply
    60,618.40x = 90,690 × 39,882.40
  4. Step 4: Simplify right side
    60,618.40x = 3,616,934,856
  5. Step 5: Solve for x
    x = 3,616,934,856/60,618.40
  6. Step 6: Final answer
    x = 59,667.28

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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.