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Finding the Fourth Proportional to 125,355.12, 188,065.10 and 73,407.88

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Solution

The fourth proportional to 125,355.12, 188,065.10 and 73,407.88 is: 110,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,355.12 : 188,065.10 = 73,407.88 : x
  2. Step 2: Convert to fraction form
    125,355.12/188,065.10 = 73,407.88/x
  3. Step 3: Cross multiply
    125,355.12x = 188,065.10 × 73,407.88
  4. Step 4: Simplify right side
    125,355.12x = 13,805,459,834.87
  5. Step 5: Solve for x
    x = 13,805,459,834.87/125,355.12
  6. Step 6: Final answer
    x = 110,130.80

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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.