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Finding the Fourth Proportional to 125,756.88, 188,518.08 and 86,332.56

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Solution

The fourth proportional to 125,756.88, 188,518.08 and 86,332.56 is: 129,418.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,756.88 : 188,518.08 = 86,332.56 : x
  2. Step 2: Convert to fraction form
    125,756.88/188,518.08 = 86,332.56/x
  3. Step 3: Cross multiply
    125,756.88x = 188,518.08 × 86,332.56
  4. Step 4: Simplify right side
    125,756.88x = 16,275,248,452.68
  5. Step 5: Solve for x
    x = 16,275,248,452.68/125,756.88
  6. Step 6: Final answer
    x = 129,418.35

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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.