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Finding the Fourth Proportional to 312,387.25, 468,599.04 and 87,765.20

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Solution

The fourth proportional to 312,387.25, 468,599.04 and 87,765.20 is: 131,652.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,387.25 : 468,599.04 = 87,765.20 : x
  2. Step 2: Convert to fraction form
    312,387.25/468,599.04 = 87,765.20/x
  3. Step 3: Cross multiply
    312,387.25x = 468,599.04 × 87,765.20
  4. Step 4: Simplify right side
    312,387.25x = 41,126,686,561.72
  5. Step 5: Solve for x
    x = 41,126,686,561.72/312,387.25
  6. Step 6: Final answer
    x = 131,652.90

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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.