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Finding the Fourth Proportional to 129,652.68, 194,479.20 and 85,476.72

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Solution

The fourth proportional to 129,652.68, 194,479.20 and 85,476.72 is: 128,215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,652.68 : 194,479.20 = 85,476.72 : x
  2. Step 2: Convert to fraction form
    129,652.68/194,479.20 = 85,476.72/x
  3. Step 3: Cross multiply
    129,652.68x = 194,479.20 × 85,476.72
  4. Step 4: Simplify right side
    129,652.68x = 16,623,444,124.22
  5. Step 5: Solve for x
    x = 16,623,444,124.22/129,652.68
  6. Step 6: Final answer
    x = 128,215.20

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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.