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Finding the Fourth Proportional to 125,425.70, 188,138.55 and 72,281.60

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Solution

The fourth proportional to 125,425.70, 188,138.55 and 72,281.60 is: 108,422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,425.70 : 188,138.55 = 72,281.60 : x
  2. Step 2: Convert to fraction form
    125,425.70/188,138.55 = 72,281.60/x
  3. Step 3: Cross multiply
    125,425.70x = 188,138.55 × 72,281.60
  4. Step 4: Simplify right side
    125,425.70x = 13,598,955,415.68
  5. Step 5: Solve for x
    x = 13,598,955,415.68/125,425.70
  6. Step 6: Final answer
    x = 108,422.40

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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.