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Finding the Fourth Proportional to 91,807.76, 126,691.87 and 50,971.01

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Solution

The fourth proportional to 91,807.76, 126,691.87 and 50,971.01 is: 70,338.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,807.76 : 126,691.87 = 50,971.01 : x
  2. Step 2: Convert to fraction form
    91,807.76/126,691.87 = 50,971.01/x
  3. Step 3: Cross multiply
    91,807.76x = 126,691.87 × 50,971.01
  4. Step 4: Simplify right side
    91,807.76x = 6,457,612,103.71
  5. Step 5: Solve for x
    x = 6,457,612,103.71/91,807.76
  6. Step 6: Final answer
    x = 70,338.41

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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.