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Finding the Fourth Proportional to 78,967.56, 108,972.02 and 43,158.76

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Solution

The fourth proportional to 78,967.56, 108,972.02 and 43,158.76 is: 59,557.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,967.56 : 108,972.02 = 43,158.76 : x
  2. Step 2: Convert to fraction form
    78,967.56/108,972.02 = 43,158.76/x
  3. Step 3: Cross multiply
    78,967.56x = 108,972.02 × 43,158.76
  4. Step 4: Simplify right side
    78,967.56x = 4,703,097,257.90
  5. Step 5: Solve for x
    x = 4,703,097,257.90/78,967.56
  6. Step 6: Final answer
    x = 59,557.33

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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.