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Finding the Fourth Proportional to 125,309.39, 172,911.02 and 71,597.89

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Solution

The fourth proportional to 125,309.39, 172,911.02 and 71,597.89 is: 98,795.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,309.39 : 172,911.02 = 71,597.89 : x
  2. Step 2: Convert to fraction form
    125,309.39/172,911.02 = 71,597.89/x
  3. Step 3: Cross multiply
    125,309.39x = 172,911.02 × 71,597.89
  4. Step 4: Simplify right side
    125,309.39x = 12,380,063,325.19
  5. Step 5: Solve for x
    x = 12,380,063,325.19/125,309.39
  6. Step 6: Final answer
    x = 98,795.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.