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Finding the Fourth Proportional to 99,702.20, 149,188.80 and 73,458.20

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Solution

The fourth proportional to 99,702.20, 149,188.80 and 73,458.20 is: 109,918.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,702.20 : 149,188.80 = 73,458.20 : x
  2. Step 2: Convert to fraction form
    99,702.20/149,188.80 = 73,458.20/x
  3. Step 3: Cross multiply
    99,702.20x = 149,188.80 × 73,458.20
  4. Step 4: Simplify right side
    99,702.20x = 10,959,140,708.16
  5. Step 5: Solve for x
    x = 10,959,140,708.16/99,702.20
  6. Step 6: Final answer
    x = 109,918.75

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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.