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Finding the Fourth Proportional to 99,237.78, 149,518.56 and 89,761.02

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Solution

The fourth proportional to 99,237.78, 149,518.56 and 89,761.02 is: 135,240.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,237.78 : 149,518.56 = 89,761.02 : x
  2. Step 2: Convert to fraction form
    99,237.78/149,518.56 = 89,761.02/x
  3. Step 3: Cross multiply
    99,237.78x = 149,518.56 × 89,761.02
  4. Step 4: Simplify right side
    99,237.78x = 13,420,938,454.53
  5. Step 5: Solve for x
    x = 13,420,938,454.53/99,237.78
  6. Step 6: Final answer
    x = 135,240.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.