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Finding the Fourth Proportional to 92,770.98, 139,042.40 and 42,781.68

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Solution

The fourth proportional to 92,770.98, 139,042.40 and 42,781.68 is: 64,119.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,770.98 : 139,042.40 = 42,781.68 : x
  2. Step 2: Convert to fraction form
    92,770.98/139,042.40 = 42,781.68/x
  3. Step 3: Cross multiply
    92,770.98x = 139,042.40 × 42,781.68
  4. Step 4: Simplify right side
    92,770.98x = 5,948,467,463.23
  5. Step 5: Solve for x
    x = 5,948,467,463.23/92,770.98
  6. Step 6: Final answer
    x = 64,119.92

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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.