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Finding the Fourth Proportional to 129,954.98, 179,284.50 and 78,959.48

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Solution

The fourth proportional to 129,954.98, 179,284.50 and 78,959.48 is: 108,931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,954.98 : 179,284.50 = 78,959.48 : x
  2. Step 2: Convert to fraction form
    129,954.98/179,284.50 = 78,959.48/x
  3. Step 3: Cross multiply
    129,954.98x = 179,284.50 × 78,959.48
  4. Step 4: Simplify right side
    129,954.98x = 14,156,209,995.64
  5. Step 5: Solve for x
    x = 14,156,209,995.64/129,954.98
  6. Step 6: Final answer
    x = 108,931.64

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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.