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Finding the Fourth Proportional to 91,057.76, 125,668 and 55,256.88

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Solution

The fourth proportional to 91,057.76, 125,668 and 55,256.88 is: 76,259.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,057.76 : 125,668 = 55,256.88 : x
  2. Step 2: Convert to fraction form
    91,057.76/125,668 = 55,256.88/x
  3. Step 3: Cross multiply
    91,057.76x = 125,668 × 55,256.88
  4. Step 4: Simplify right side
    91,057.76x = 6,944,021,595.84
  5. Step 5: Solve for x
    x = 6,944,021,595.84/91,057.76
  6. Step 6: Final answer
    x = 76,259.53

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1.5x scale

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.