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Finding the Fourth Proportional to 91,468.80, 126,232.80 and 51,187.20

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Solution

The fourth proportional to 91,468.80, 126,232.80 and 51,187.20 is: 70,641.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,468.80 : 126,232.80 = 51,187.20 : x
  2. Step 2: Convert to fraction form
    91,468.80/126,232.80 = 51,187.20/x
  3. Step 3: Cross multiply
    91,468.80x = 126,232.80 × 51,187.20
  4. Step 4: Simplify right side
    91,468.80x = 6,461,503,580.16
  5. Step 5: Solve for x
    x = 6,461,503,580.16/91,468.80
  6. Step 6: Final answer
    x = 70,641.61

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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.