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Finding the Fourth Proportional to 129,812.60, 194,718.90 and 79,730.30

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Solution

The fourth proportional to 129,812.60, 194,718.90 and 79,730.30 is: 119,595.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,812.60 : 194,718.90 = 79,730.30 : x
  2. Step 2: Convert to fraction form
    129,812.60/194,718.90 = 79,730.30/x
  3. Step 3: Cross multiply
    129,812.60x = 194,718.90 × 79,730.30
  4. Step 4: Simplify right side
    129,812.60x = 15,524,996,312.67
  5. Step 5: Solve for x
    x = 15,524,996,312.67/129,812.60
  6. Step 6: Final answer
    x = 119,595.45

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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.