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Finding the Fourth Proportional to 78,679.04, 117,956.88 and 53,656.88

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Solution

The fourth proportional to 78,679.04, 117,956.88 and 53,656.88 is: 80,443.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,679.04 : 117,956.88 = 53,656.88 : x
  2. Step 2: Convert to fraction form
    78,679.04/117,956.88 = 53,656.88/x
  3. Step 3: Cross multiply
    78,679.04x = 117,956.88 × 53,656.88
  4. Step 4: Simplify right side
    78,679.04x = 6,329,198,155.33
  5. Step 5: Solve for x
    x = 6,329,198,155.33/78,679.04
  6. Step 6: Final answer
    x = 80,443.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.