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Finding the Fourth Proportional to 78,882.32, 108,857.80 and 43,072.40

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Solution

The fourth proportional to 78,882.32, 108,857.80 and 43,072.40 is: 59,440.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,882.32 : 108,857.80 = 43,072.40 : x
  2. Step 2: Convert to fraction form
    78,882.32/108,857.80 = 43,072.40/x
  3. Step 3: Cross multiply
    78,882.32x = 108,857.80 × 43,072.40
  4. Step 4: Simplify right side
    78,882.32x = 4,688,766,704.72
  5. Step 5: Solve for x
    x = 4,688,766,704.72/78,882.32
  6. Step 6: Final answer
    x = 59,440.02

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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.