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Finding the Fourth Proportional to 99,567.60, 149,351.40 and 73,129.20

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Solution

The fourth proportional to 99,567.60, 149,351.40 and 73,129.20 is: 109,693.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,567.60 : 149,351.40 = 73,129.20 : x
  2. Step 2: Convert to fraction form
    99,567.60/149,351.40 = 73,129.20/x
  3. Step 3: Cross multiply
    99,567.60x = 149,351.40 × 73,129.20
  4. Step 4: Simplify right side
    99,567.60x = 10,921,948,400.88
  5. Step 5: Solve for x
    x = 10,921,948,400.88/99,567.60
  6. Step 6: Final answer
    x = 109,693.80

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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.