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Finding the Fourth Proportional to 91,387.94, 126,114.64 and 51,101.78

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Solution

The fourth proportional to 91,387.94, 126,114.64 and 51,101.78 is: 70,520.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,387.94 : 126,114.64 = 51,101.78 : x
  2. Step 2: Convert to fraction form
    91,387.94/126,114.64 = 51,101.78/x
  3. Step 3: Cross multiply
    91,387.94x = 126,114.64 × 51,101.78
  4. Step 4: Simplify right side
    91,387.94x = 6,444,681,829.73
  5. Step 5: Solve for x
    x = 6,444,681,829.73/91,387.94
  6. Step 6: Final answer
    x = 70,520.05

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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.