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Finding the Fourth Proportional to 92,534.60, 138,834.30 and 39,981.80

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Solution

The fourth proportional to 92,534.60, 138,834.30 and 39,981.80 is: 59,986.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,534.60 : 138,834.30 = 39,981.80 : x
  2. Step 2: Convert to fraction form
    92,534.60/138,834.30 = 39,981.80/x
  3. Step 3: Cross multiply
    92,534.60x = 138,834.30 × 39,981.80
  4. Step 4: Simplify right side
    92,534.60x = 5,550,845,215.74
  5. Step 5: Solve for x
    x = 5,550,845,215.74/92,534.60
  6. Step 6: Final answer
    x = 59,986.70

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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.