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Finding the Fourth Proportional to 121,704, 182,587.04 and 86,235.36

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Solution

The fourth proportional to 121,704, 182,587.04 and 86,235.36 is: 129,375.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,704 : 182,587.04 = 86,235.36 : x
  2. Step 2: Convert to fraction form
    121,704/182,587.04 = 86,235.36/x
  3. Step 3: Cross multiply
    121,704x = 182,587.04 × 86,235.36
  4. Step 4: Simplify right side
    121,704x = 15,745,459,125.73
  5. Step 5: Solve for x
    x = 15,745,459,125.73/121,704
  6. Step 6: Final answer
    x = 129,375.03

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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.