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Finding the Fourth Proportional to 120,034.86, 165,717.27 and 79,803.78

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Solution

The fourth proportional to 120,034.86, 165,717.27 and 79,803.78 is: 110,175.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,034.86 : 165,717.27 = 79,803.78 : x
  2. Step 2: Convert to fraction form
    120,034.86/165,717.27 = 79,803.78/x
  3. Step 3: Cross multiply
    120,034.86x = 165,717.27 × 79,803.78
  4. Step 4: Simplify right side
    120,034.86x = 13,224,864,557.28
  5. Step 5: Solve for x
    x = 13,224,864,557.28/120,034.86
  6. Step 6: Final answer
    x = 110,175.20

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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.