Home / 80,877.40-121,316.10-72,712.60

Finding the Fourth Proportional to 80,877.40, 121,316.10 and 72,712.60

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Solution

The fourth proportional to 80,877.40, 121,316.10 and 72,712.60 is: 109,068.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,877.40 : 121,316.10 = 72,712.60 : x
  2. Step 2: Convert to fraction form
    80,877.40/121,316.10 = 72,712.60/x
  3. Step 3: Cross multiply
    80,877.40x = 121,316.10 × 72,712.60
  4. Step 4: Simplify right side
    80,877.40x = 8,821,209,052.86
  5. Step 5: Solve for x
    x = 8,821,209,052.86/80,877.40
  6. Step 6: Final answer
    x = 109,068.90

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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.