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Finding the Fourth Proportional to 125,479.56, 188,283.84 and 83,388.72

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Solution

The fourth proportional to 125,479.56, 188,283.84 and 83,388.72 is: 125,125.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,479.56 : 188,283.84 = 83,388.72 : x
  2. Step 2: Convert to fraction form
    125,479.56/188,283.84 = 83,388.72/x
  3. Step 3: Cross multiply
    125,479.56x = 188,283.84 × 83,388.72
  4. Step 4: Simplify right side
    125,479.56x = 15,700,748,414.28
  5. Step 5: Solve for x
    x = 15,700,748,414.28/125,479.56
  6. Step 6: Final answer
    x = 125,125.94

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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.