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Finding the Fourth Proportional to 91,865.04, 126,741 and 57,876.60

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Solution

The fourth proportional to 91,865.04, 126,741 and 57,876.60 is: 79,849.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,865.04 : 126,741 = 57,876.60 : x
  2. Step 2: Convert to fraction form
    91,865.04/126,741 = 57,876.60/x
  3. Step 3: Cross multiply
    91,865.04x = 126,741 × 57,876.60
  4. Step 4: Simplify right side
    91,865.04x = 7,335,338,160.60
  5. Step 5: Solve for x
    x = 7,335,338,160.60/91,865.04
  6. Step 6: Final answer
    x = 79,849.07

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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.