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Finding the Fourth Proportional to 99,773.80, 149,228.70 and 89,319.40

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Solution

The fourth proportional to 99,773.80, 149,228.70 and 89,319.40 is: 133,592.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,773.80 : 149,228.70 = 89,319.40 : x
  2. Step 2: Convert to fraction form
    99,773.80/149,228.70 = 89,319.40/x
  3. Step 3: Cross multiply
    99,773.80x = 149,228.70 × 89,319.40
  4. Step 4: Simplify right side
    99,773.80x = 13,329,017,946.78
  5. Step 5: Solve for x
    x = 13,329,017,946.78/99,773.80
  6. Step 6: Final answer
    x = 133,592.37

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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.