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Finding the Fourth Proportional to 91,609.80, 126,425.16 and 51,323.90

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Solution

The fourth proportional to 91,609.80, 126,425.16 and 51,323.90 is: 70,829.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,609.80 : 126,425.16 = 51,323.90 : x
  2. Step 2: Convert to fraction form
    91,609.80/126,425.16 = 51,323.90/x
  3. Step 3: Cross multiply
    91,609.80x = 126,425.16 × 51,323.90
  4. Step 4: Simplify right side
    91,609.80x = 6,488,632,269.32
  5. Step 5: Solve for x
    x = 6,488,632,269.32/91,609.80
  6. Step 6: Final answer
    x = 70,829.02

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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.