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Finding the Fourth Proportional to 118,291.60, 177,432.18 and 39,403

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Solution

The fourth proportional to 118,291.60, 177,432.18 and 39,403 is: 59,102.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,291.60 : 177,432.18 = 39,403 : x
  2. Step 2: Convert to fraction form
    118,291.60/177,432.18 = 39,403/x
  3. Step 3: Cross multiply
    118,291.60x = 177,432.18 × 39,403
  4. Step 4: Simplify right side
    118,291.60x = 6,991,360,188.54
  5. Step 5: Solve for x
    x = 6,991,360,188.54/118,291.60
  6. Step 6: Final answer
    x = 59,102.76

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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.