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Finding the Fourth Proportional to 129,913.97, 179,277.80 and 72,551.70

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Solution

The fourth proportional to 129,913.97, 179,277.80 and 72,551.70 is: 100,119.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,913.97 : 179,277.80 = 72,551.70 : x
  2. Step 2: Convert to fraction form
    129,913.97/179,277.80 = 72,551.70/x
  3. Step 3: Cross multiply
    129,913.97x = 179,277.80 × 72,551.70
  4. Step 4: Simplify right side
    129,913.97x = 13,006,908,799.50
  5. Step 5: Solve for x
    x = 13,006,908,799.50/129,913.97
  6. Step 6: Final answer
    x = 100,119.40

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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.