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Finding the Fourth Proportional to 91,851.91, 126,751.57 and 51,564.87

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Solution

The fourth proportional to 91,851.91, 126,751.57 and 51,564.87 is: 71,157.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,851.91 : 126,751.57 = 51,564.87 : x
  2. Step 2: Convert to fraction form
    91,851.91/126,751.57 = 51,564.87/x
  3. Step 3: Cross multiply
    91,851.91x = 126,751.57 × 51,564.87
  4. Step 4: Simplify right side
    91,851.91x = 6,535,928,100.43
  5. Step 5: Solve for x
    x = 6,535,928,100.43/91,851.91
  6. Step 6: Final answer
    x = 71,157.24

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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.