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Finding the Fourth Proportional to 125,393.30, 188,256.90 and 72,840.50

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Solution

The fourth proportional to 125,393.30, 188,256.90 and 72,840.50 is: 109,357.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,393.30 : 188,256.90 = 72,840.50 : x
  2. Step 2: Convert to fraction form
    125,393.30/188,256.90 = 72,840.50/x
  3. Step 3: Cross multiply
    125,393.30x = 188,256.90 × 72,840.50
  4. Step 4: Simplify right side
    125,393.30x = 13,712,726,724.45
  5. Step 5: Solve for x
    x = 13,712,726,724.45/125,393.30
  6. Step 6: Final answer
    x = 109,357.73

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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.