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Finding the Fourth Proportional to 91,780.80, 126,655.20 and 54,057.60

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Solution

The fourth proportional to 91,780.80, 126,655.20 and 54,057.60 is: 74,598.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,780.80 : 126,655.20 = 54,057.60 : x
  2. Step 2: Convert to fraction form
    91,780.80/126,655.20 = 54,057.60/x
  3. Step 3: Cross multiply
    91,780.80x = 126,655.20 × 54,057.60
  4. Step 4: Simplify right side
    91,780.80x = 6,846,676,139.52
  5. Step 5: Solve for x
    x = 6,846,676,139.52/91,780.80
  6. Step 6: Final answer
    x = 74,598.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.