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Finding the Fourth Proportional to 91,321.79, 126,023.90 and 53,103.75

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Solution

The fourth proportional to 91,321.79, 126,023.90 and 53,103.75 is: 73,283.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,321.79 : 126,023.90 = 53,103.75 : x
  2. Step 2: Convert to fraction form
    91,321.79/126,023.90 = 53,103.75/x
  3. Step 3: Cross multiply
    91,321.79x = 126,023.90 × 53,103.75
  4. Step 4: Simplify right side
    91,321.79x = 6,692,341,414.11
  5. Step 5: Solve for x
    x = 6,692,341,414.11/91,321.79
  6. Step 6: Final answer
    x = 73,283.08

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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.