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Finding the Fourth Proportional to 91,356, 126,083.43 and 53,630.25

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Solution

The fourth proportional to 91,356, 126,083.43 and 53,630.25 is: 74,016.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,356 : 126,083.43 = 53,630.25 : x
  2. Step 2: Convert to fraction form
    91,356/126,083.43 = 53,630.25/x
  3. Step 3: Cross multiply
    91,356x = 126,083.43 × 53,630.25
  4. Step 4: Simplify right side
    91,356x = 6,761,885,871.76
  5. Step 5: Solve for x
    x = 6,761,885,871.76/91,356
  6. Step 6: Final answer
    x = 74,016.88

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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.