Home / 91,818.40-137,727.60-81,104.80

Finding the Fourth Proportional to 91,818.40, 137,727.60 and 81,104.80

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Solution

The fourth proportional to 91,818.40, 137,727.60 and 81,104.80 is: 121,657.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,818.40 : 137,727.60 = 81,104.80 : x
  2. Step 2: Convert to fraction form
    91,818.40/137,727.60 = 81,104.80/x
  3. Step 3: Cross multiply
    91,818.40x = 137,727.60 × 81,104.80
  4. Step 4: Simplify right side
    91,818.40x = 11,170,369,452.48
  5. Step 5: Solve for x
    x = 11,170,369,452.48/91,818.40
  6. Step 6: Final answer
    x = 121,657.20

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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.