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Finding the Fourth Proportional to 89,909.20, 134,863.80 and 61,915.60

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Solution

The fourth proportional to 89,909.20, 134,863.80 and 61,915.60 is: 92,873.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,909.20 : 134,863.80 = 61,915.60 : x
  2. Step 2: Convert to fraction form
    89,909.20/134,863.80 = 61,915.60/x
  3. Step 3: Cross multiply
    89,909.20x = 134,863.80 × 61,915.60
  4. Step 4: Simplify right side
    89,909.20x = 8,350,173,095.28
  5. Step 5: Solve for x
    x = 8,350,173,095.28/89,909.20
  6. Step 6: Final answer
    x = 92,873.40

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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.