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Finding the Fourth Proportional to 129,655.68, 194,483.70 and 85,479.72

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Solution

The fourth proportional to 129,655.68, 194,483.70 and 85,479.72 is: 128,219.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,655.68 : 194,483.70 = 85,479.72 : x
  2. Step 2: Convert to fraction form
    129,655.68/194,483.70 = 85,479.72/x
  3. Step 3: Cross multiply
    129,655.68x = 194,483.70 × 85,479.72
  4. Step 4: Simplify right side
    129,655.68x = 16,624,412,220.56
  5. Step 5: Solve for x
    x = 16,624,412,220.56/129,655.68
  6. Step 6: Final answer
    x = 128,219.70

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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.