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Finding the Fourth Proportional to 100,916.96, 139,265.44 and 58,500.12

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Solution

The fourth proportional to 100,916.96, 139,265.44 and 58,500.12 is: 80,730.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,916.96 : 139,265.44 = 58,500.12 : x
  2. Step 2: Convert to fraction form
    100,916.96/139,265.44 = 58,500.12/x
  3. Step 3: Cross multiply
    100,916.96x = 139,265.44 × 58,500.12
  4. Step 4: Simplify right side
    100,916.96x = 8,147,044,951.85
  5. Step 5: Solve for x
    x = 8,147,044,951.85/100,916.96
  6. Step 6: Final answer
    x = 80,730.19

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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.