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Finding the Fourth Proportional to 72,091.76, 99,472.20 and 40,255.76

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Solution

The fourth proportional to 72,091.76, 99,472.20 and 40,255.76 is: 55,544.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,091.76 : 99,472.20 = 40,255.76 : x
  2. Step 2: Convert to fraction form
    72,091.76/99,472.20 = 40,255.76/x
  3. Step 3: Cross multiply
    72,091.76x = 99,472.20 × 40,255.76
  4. Step 4: Simplify right side
    72,091.76x = 4,004,329,009.87
  5. Step 5: Solve for x
    x = 4,004,329,009.87/72,091.76
  6. Step 6: Final answer
    x = 55,544.89

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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.