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Finding the Fourth Proportional to 129,908.64, 179,254.64 and 78,894.76

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Solution

The fourth proportional to 129,908.64, 179,254.64 and 78,894.76 is: 108,863.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,908.64 : 179,254.64 = 78,894.76 : x
  2. Step 2: Convert to fraction form
    129,908.64/179,254.64 = 78,894.76/x
  3. Step 3: Cross multiply
    129,908.64x = 179,254.64 × 78,894.76
  4. Step 4: Simplify right side
    129,908.64x = 14,142,251,801.69
  5. Step 5: Solve for x
    x = 14,142,251,801.69/129,908.64
  6. Step 6: Final answer
    x = 108,863.06

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1.5x scale

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.