Home / 111,512.48-153,769.20-79,669.76

Finding the Fourth Proportional to 111,512.48, 153,769.20 and 79,669.76

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Solution

The fourth proportional to 111,512.48, 153,769.20 and 79,669.76 is: 109,859.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,512.48 : 153,769.20 = 79,669.76 : x
  2. Step 2: Convert to fraction form
    111,512.48/153,769.20 = 79,669.76/x
  3. Step 3: Cross multiply
    111,512.48x = 153,769.20 × 79,669.76
  4. Step 4: Simplify right side
    111,512.48x = 12,250,755,259.39
  5. Step 5: Solve for x
    x = 12,250,755,259.39/111,512.48
  6. Step 6: Final answer
    x = 109,859.95

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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.