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Finding the Fourth Proportional to 118,513.20, 177,337.80 and 87,409.20

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Solution

The fourth proportional to 118,513.20, 177,337.80 and 87,409.20 is: 130,795.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,513.20 : 177,337.80 = 87,409.20 : x
  2. Step 2: Convert to fraction form
    118,513.20/177,337.80 = 87,409.20/x
  3. Step 3: Cross multiply
    118,513.20x = 177,337.80 × 87,409.20
  4. Step 4: Simplify right side
    118,513.20x = 15,500,955,227.76
  5. Step 5: Solve for x
    x = 15,500,955,227.76/118,513.20
  6. Step 6: Final answer
    x = 130,795.18

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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.