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Finding the Fourth Proportional to 99,912.54, 149,898.78 and 42,237.12

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Solution

The fourth proportional to 99,912.54, 149,898.78 and 42,237.12 is: 63,368.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,912.54 : 149,898.78 = 42,237.12 : x
  2. Step 2: Convert to fraction form
    99,912.54/149,898.78 = 42,237.12/x
  3. Step 3: Cross multiply
    99,912.54x = 149,898.78 × 42,237.12
  4. Step 4: Simplify right side
    99,912.54x = 6,331,292,758.71
  5. Step 5: Solve for x
    x = 6,331,292,758.71/99,912.54
  6. Step 6: Final answer
    x = 63,368.35

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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.