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Finding the Fourth Proportional to 312,562.80, 468,795.60 and 87,901.20

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Solution

The fourth proportional to 312,562.80, 468,795.60 and 87,901.20 is: 131,838.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,562.80 : 468,795.60 = 87,901.20 : x
  2. Step 2: Convert to fraction form
    312,562.80/468,795.60 = 87,901.20/x
  3. Step 3: Cross multiply
    312,562.80x = 468,795.60 × 87,901.20
  4. Step 4: Simplify right side
    312,562.80x = 41,207,695,794.72
  5. Step 5: Solve for x
    x = 41,207,695,794.72/312,562.80
  6. Step 6: Final answer
    x = 131,838.13

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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.