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Finding the Fourth Proportional to 80,962.40, 121,443.60 and 75,713.60

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Solution

The fourth proportional to 80,962.40, 121,443.60 and 75,713.60 is: 113,570.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,962.40 : 121,443.60 = 75,713.60 : x
  2. Step 2: Convert to fraction form
    80,962.40/121,443.60 = 75,713.60/x
  3. Step 3: Cross multiply
    80,962.40x = 121,443.60 × 75,713.60
  4. Step 4: Simplify right side
    80,962.40x = 9,194,932,152.96
  5. Step 5: Solve for x
    x = 9,194,932,152.96/80,962.40
  6. Step 6: Final answer
    x = 113,570.40

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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.