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Finding the Fourth Proportional to 91,619.88, 126,432.80 and 53,387.88

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Solution

The fourth proportional to 91,619.88, 126,432.80 and 53,387.88 is: 73,673.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,619.88 : 126,432.80 = 53,387.88 : x
  2. Step 2: Convert to fraction form
    91,619.88/126,432.80 = 53,387.88/x
  3. Step 3: Cross multiply
    91,619.88x = 126,432.80 × 53,387.88
  4. Step 4: Simplify right side
    91,619.88x = 6,749,979,154.46
  5. Step 5: Solve for x
    x = 6,749,979,154.46/91,619.88
  6. Step 6: Final answer
    x = 73,673.74

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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.