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Finding the Fourth Proportional to 129,659.68, 194,489.70 and 85,483.72

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Solution

The fourth proportional to 129,659.68, 194,489.70 and 85,483.72 is: 128,225.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,659.68 : 194,489.70 = 85,483.72 : x
  2. Step 2: Convert to fraction form
    129,659.68/194,489.70 = 85,483.72/x
  3. Step 3: Cross multiply
    129,659.68x = 194,489.70 × 85,483.72
  4. Step 4: Simplify right side
    129,659.68x = 16,625,703,057.68
  5. Step 5: Solve for x
    x = 16,625,703,057.68/129,659.68
  6. Step 6: Final answer
    x = 128,225.70

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1.5x scale

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.