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Finding the Fourth Proportional to 91,448.57, 126,174.69 and 62,777

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Solution

The fourth proportional to 91,448.57, 126,174.69 and 62,777 is: 86,615.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,448.57 : 126,174.69 = 62,777 : x
  2. Step 2: Convert to fraction form
    91,448.57/126,174.69 = 62,777/x
  3. Step 3: Cross multiply
    91,448.57x = 126,174.69 × 62,777
  4. Step 4: Simplify right side
    91,448.57x = 7,920,868,514.13
  5. Step 5: Solve for x
    x = 7,920,868,514.13/91,448.57
  6. Step 6: Final answer
    x = 86,615.55

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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.