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Finding the Fourth Proportional to 78,605.60, 117,834.28 and 39,125.39

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Solution

The fourth proportional to 78,605.60, 117,834.28 and 39,125.39 is: 58,651.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,605.60 : 117,834.28 = 39,125.39 : x
  2. Step 2: Convert to fraction form
    78,605.60/117,834.28 = 39,125.39/x
  3. Step 3: Cross multiply
    78,605.60x = 117,834.28 × 39,125.39
  4. Step 4: Simplify right side
    78,605.60x = 4,610,312,160.37
  5. Step 5: Solve for x
    x = 4,610,312,160.37/78,605.60
  6. Step 6: Final answer
    x = 58,651.19

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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.