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Finding the Fourth Proportional to 91,331, 126,041.58 and 55,515.20

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Solution

The fourth proportional to 91,331, 126,041.58 and 55,515.20 is: 76,613.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,331 : 126,041.58 = 55,515.20 : x
  2. Step 2: Convert to fraction form
    91,331/126,041.58 = 55,515.20/x
  3. Step 3: Cross multiply
    91,331x = 126,041.58 × 55,515.20
  4. Step 4: Simplify right side
    91,331x = 6,997,223,522.02
  5. Step 5: Solve for x
    x = 6,997,223,522.02/91,331
  6. Step 6: Final answer
    x = 76,613.89

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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.