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Finding the Fourth Proportional to 91,825.68, 126,683.28 and 53,042.88

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Solution

The fourth proportional to 91,825.68, 126,683.28 and 53,042.88 is: 73,178.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,825.68 : 126,683.28 = 53,042.88 : x
  2. Step 2: Convert to fraction form
    91,825.68/126,683.28 = 53,042.88/x
  3. Step 3: Cross multiply
    91,825.68x = 126,683.28 × 53,042.88
  4. Step 4: Simplify right side
    91,825.68x = 6,719,646,019.05
  5. Step 5: Solve for x
    x = 6,719,646,019.05/91,825.68
  6. Step 6: Final answer
    x = 73,178.29

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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.