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Finding the Fourth Proportional to 99,398.87, 149,127.69 and 57,309.14

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Solution

The fourth proportional to 99,398.87, 149,127.69 and 57,309.14 is: 85,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,398.87 : 149,127.69 = 57,309.14 : x
  2. Step 2: Convert to fraction form
    99,398.87/149,127.69 = 57,309.14/x
  3. Step 3: Cross multiply
    99,398.87x = 149,127.69 × 57,309.14
  4. Step 4: Simplify right side
    99,398.87x = 8,546,379,377.54
  5. Step 5: Solve for x
    x = 8,546,379,377.54/99,398.87
  6. Step 6: Final answer
    x = 85,980.65

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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.