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Finding the Fourth Proportional to 99,788.76, 149,603.61 and 57,620.97

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Solution

The fourth proportional to 99,788.76, 149,603.61 and 57,620.97 is: 86,385.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,788.76 : 149,603.61 = 57,620.97 : x
  2. Step 2: Convert to fraction form
    99,788.76/149,603.61 = 57,620.97/x
  3. Step 3: Cross multiply
    99,788.76x = 149,603.61 × 57,620.97
  4. Step 4: Simplify right side
    99,788.76x = 8,620,305,123.70
  5. Step 5: Solve for x
    x = 8,620,305,123.70/99,788.76
  6. Step 6: Final answer
    x = 86,385.53

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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.