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Finding the Fourth Proportional to 91,551.26, 126,342.78 and 64,741.88

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Solution

The fourth proportional to 91,551.26, 126,342.78 and 64,741.88 is: 89,345.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,551.26 : 126,342.78 = 64,741.88 : x
  2. Step 2: Convert to fraction form
    91,551.26/126,342.78 = 64,741.88/x
  3. Step 3: Cross multiply
    91,551.26x = 126,342.78 × 64,741.88
  4. Step 4: Simplify right side
    91,551.26x = 8,179,669,101.63
  5. Step 5: Solve for x
    x = 8,179,669,101.63/91,551.26
  6. Step 6: Final answer
    x = 89,345.24

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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.