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Finding the Fourth Proportional to 103,437.20, 155,155.80 and 102,781.10

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Solution

The fourth proportional to 103,437.20, 155,155.80 and 102,781.10 is: 154,171.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,437.20 : 155,155.80 = 102,781.10 : x
  2. Step 2: Convert to fraction form
    103,437.20/155,155.80 = 102,781.10/x
  3. Step 3: Cross multiply
    103,437.20x = 155,155.80 × 102,781.10
  4. Step 4: Simplify right side
    103,437.20x = 15,947,083,795.38
  5. Step 5: Solve for x
    x = 15,947,083,795.38/103,437.20
  6. Step 6: Final answer
    x = 154,171.65

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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.