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Finding the Fourth Proportional to 99,765.80, 149,216.70 and 89,311.40

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Solution

The fourth proportional to 99,765.80, 149,216.70 and 89,311.40 is: 133,580.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,765.80 : 149,216.70 = 89,311.40 : x
  2. Step 2: Convert to fraction form
    99,765.80/149,216.70 = 89,311.40/x
  3. Step 3: Cross multiply
    99,765.80x = 149,216.70 × 89,311.40
  4. Step 4: Simplify right side
    99,765.80x = 13,326,752,380.38
  5. Step 5: Solve for x
    x = 13,326,752,380.38/99,765.80
  6. Step 6: Final answer
    x = 133,580.37

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1.5x scale

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.