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Finding the Fourth Proportional to 125,189.25, 172,666.92 and 86,948.84

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Solution

The fourth proportional to 125,189.25, 172,666.92 and 86,948.84 is: 119,923.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,189.25 : 172,666.92 = 86,948.84 : x
  2. Step 2: Convert to fraction form
    125,189.25/172,666.92 = 86,948.84/x
  3. Step 3: Cross multiply
    125,189.25x = 172,666.92 × 86,948.84
  4. Step 4: Simplify right side
    125,189.25x = 15,013,188,400.37
  5. Step 5: Solve for x
    x = 15,013,188,400.37/125,189.25
  6. Step 6: Final answer
    x = 119,923.94

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1.5x scale

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.