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Finding the Fourth Proportional to 125,744.80, 188,835.90 and 121,808.20

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Solution

The fourth proportional to 125,744.80, 188,835.90 and 121,808.20 is: 182,924.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,744.80 : 188,835.90 = 121,808.20 : x
  2. Step 2: Convert to fraction form
    125,744.80/188,835.90 = 121,808.20/x
  3. Step 3: Cross multiply
    125,744.80x = 188,835.90 × 121,808.20
  4. Step 4: Simplify right side
    125,744.80x = 23,001,761,074.38
  5. Step 5: Solve for x
    x = 23,001,761,074.38/125,744.80
  6. Step 6: Final answer
    x = 182,924.15

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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.