Home / 91,727.20-137,590.80-80,901.55

Finding the Fourth Proportional to 91,727.20, 137,590.80 and 80,901.55

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Solution

The fourth proportional to 91,727.20, 137,590.80 and 80,901.55 is: 121,352.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,727.20 : 137,590.80 = 80,901.55 : x
  2. Step 2: Convert to fraction form
    91,727.20/137,590.80 = 80,901.55/x
  3. Step 3: Cross multiply
    91,727.20x = 137,590.80 × 80,901.55
  4. Step 4: Simplify right side
    91,727.20x = 11,131,308,985.74
  5. Step 5: Solve for x
    x = 11,131,308,985.74/91,727.20
  6. Step 6: Final answer
    x = 121,352.33

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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.