Home / 91,730.20-137,595.30-80,904.55

Finding the Fourth Proportional to 91,730.20, 137,595.30 and 80,904.55

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Solution

The fourth proportional to 91,730.20, 137,595.30 and 80,904.55 is: 121,356.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,730.20 : 137,595.30 = 80,904.55 : x
  2. Step 2: Convert to fraction form
    91,730.20/137,595.30 = 80,904.55/x
  3. Step 3: Cross multiply
    91,730.20x = 137,595.30 × 80,904.55
  4. Step 4: Simplify right side
    91,730.20x = 11,132,085,828.62
  5. Step 5: Solve for x
    x = 11,132,085,828.62/91,730.20
  6. Step 6: Final answer
    x = 121,356.83

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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.