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Finding the Fourth Proportional to 78,811.68, 108,760.50 and 43,002.48

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Solution

The fourth proportional to 78,811.68, 108,760.50 and 43,002.48 is: 59,343.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,811.68 : 108,760.50 = 43,002.48 : x
  2. Step 2: Convert to fraction form
    78,811.68/108,760.50 = 43,002.48/x
  3. Step 3: Cross multiply
    78,811.68x = 108,760.50 × 43,002.48
  4. Step 4: Simplify right side
    78,811.68x = 4,676,971,226.04
  5. Step 5: Solve for x
    x = 4,676,971,226.04/78,811.68
  6. Step 6: Final answer
    x = 59,343.63

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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.