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Finding the Fourth Proportional to 88,401.20, 132,601.80 and 78,724.40

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Solution

The fourth proportional to 88,401.20, 132,601.80 and 78,724.40 is: 118,086.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,401.20 : 132,601.80 = 78,724.40 : x
  2. Step 2: Convert to fraction form
    88,401.20/132,601.80 = 78,724.40/x
  3. Step 3: Cross multiply
    88,401.20x = 132,601.80 × 78,724.40
  4. Step 4: Simplify right side
    88,401.20x = 10,438,997,143.92
  5. Step 5: Solve for x
    x = 10,438,997,143.92/88,401.20
  6. Step 6: Final answer
    x = 118,086.60

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1.5x scale

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.