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Finding the Fourth Proportional to 79,612.78, 109,870.20 and 43,803.66

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Solution

The fourth proportional to 79,612.78, 109,870.20 and 43,803.66 is: 60,451.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,612.78 : 109,870.20 = 43,803.66 : x
  2. Step 2: Convert to fraction form
    79,612.78/109,870.20 = 43,803.66/x
  3. Step 3: Cross multiply
    79,612.78x = 109,870.20 × 43,803.66
  4. Step 4: Simplify right side
    79,612.78x = 4,812,716,884.93
  5. Step 5: Solve for x
    x = 4,812,716,884.93/79,612.78
  6. Step 6: Final answer
    x = 60,451.56

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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.