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Finding the Fourth Proportional to 125,978.68, 173,873.24 and 72,281.48

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Solution

The fourth proportional to 125,978.68, 173,873.24 and 72,281.48 is: 99,761.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,978.68 : 173,873.24 = 72,281.48 : x
  2. Step 2: Convert to fraction form
    125,978.68/173,873.24 = 72,281.48/x
  3. Step 3: Cross multiply
    125,978.68x = 173,873.24 × 72,281.48
  4. Step 4: Simplify right side
    125,978.68x = 12,567,815,119.60
  5. Step 5: Solve for x
    x = 12,567,815,119.60/125,978.68
  6. Step 6: Final answer
    x = 99,761.44

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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.