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Finding the Fourth Proportional to 312,387.57, 468,599.52 and 87,765.53

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Solution

The fourth proportional to 312,387.57, 468,599.52 and 87,765.53 is: 131,653.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,387.57 : 468,599.52 = 87,765.53 : x
  2. Step 2: Convert to fraction form
    312,387.57/468,599.52 = 87,765.53/x
  3. Step 3: Cross multiply
    312,387.57x = 468,599.52 × 87,765.53
  4. Step 4: Simplify right side
    312,387.57x = 41,126,882,887.55
  5. Step 5: Solve for x
    x = 41,126,882,887.55/312,387.57
  6. Step 6: Final answer
    x = 131,653.39

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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.