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Finding the Fourth Proportional to 91,382, 126,121.74 and 53,648.96

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Solution

The fourth proportional to 91,382, 126,121.74 and 53,648.96 is: 74,044.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,382 : 126,121.74 = 53,648.96 : x
  2. Step 2: Convert to fraction form
    91,382/126,121.74 = 53,648.96/x
  3. Step 3: Cross multiply
    91,382x = 126,121.74 × 53,648.96
  4. Step 4: Simplify right side
    91,382x = 6,766,300,184.39
  5. Step 5: Solve for x
    x = 6,766,300,184.39/91,382
  6. Step 6: Final answer
    x = 74,044.12

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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.