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Finding the Fourth Proportional to 91,607.81, 126,422.39 and 51,321.89

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Solution

The fourth proportional to 91,607.81, 126,422.39 and 51,321.89 is: 70,826.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,607.81 : 126,422.39 = 51,321.89 : x
  2. Step 2: Convert to fraction form
    91,607.81/126,422.39 = 51,321.89/x
  3. Step 3: Cross multiply
    91,607.81x = 126,422.39 × 51,321.89
  4. Step 4: Simplify right side
    91,607.81x = 6,488,236,437.48
  5. Step 5: Solve for x
    x = 6,488,236,437.48/91,607.81
  6. Step 6: Final answer
    x = 70,826.24

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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.