Home / 81,002.60-121,503.90-69,727.40

Finding the Fourth Proportional to 81,002.60, 121,503.90 and 69,727.40

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Solution

The fourth proportional to 81,002.60, 121,503.90 and 69,727.40 is: 104,591.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.60 : 121,503.90 = 69,727.40 : x
  2. Step 2: Convert to fraction form
    81,002.60/121,503.90 = 69,727.40/x
  3. Step 3: Cross multiply
    81,002.60x = 121,503.90 × 69,727.40
  4. Step 4: Simplify right side
    81,002.60x = 8,472,151,036.86
  5. Step 5: Solve for x
    x = 8,472,151,036.86/81,002.60
  6. Step 6: Final answer
    x = 104,591.10

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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.