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Finding the Fourth Proportional to 91,270.68, 125,871.72 and 76,007.77

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Solution

The fourth proportional to 91,270.68, 125,871.72 and 76,007.77 is: 104,822.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,270.68 : 125,871.72 = 76,007.77 : x
  2. Step 2: Convert to fraction form
    91,270.68/125,871.72 = 76,007.77/x
  3. Step 3: Cross multiply
    91,270.68x = 125,871.72 × 76,007.77
  4. Step 4: Simplify right side
    91,270.68x = 9,567,228,743.26
  5. Step 5: Solve for x
    x = 9,567,228,743.26/91,270.68
  6. Step 6: Final answer
    x = 104,822.59

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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.