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Finding the Fourth Proportional to 91,819.60, 137,729.40 and 88,320.40

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Solution

The fourth proportional to 91,819.60, 137,729.40 and 88,320.40 is: 132,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,819.60 : 137,729.40 = 88,320.40 : x
  2. Step 2: Convert to fraction form
    91,819.60/137,729.40 = 88,320.40/x
  3. Step 3: Cross multiply
    91,819.60x = 137,729.40 × 88,320.40
  4. Step 4: Simplify right side
    91,819.60x = 12,164,315,699.76
  5. Step 5: Solve for x
    x = 12,164,315,699.76/91,819.60
  6. Step 6: Final answer
    x = 132,480.60

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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.