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Finding the Fourth Proportional to 138,328.10, 207,492.15 and 133,516.70

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Solution

The fourth proportional to 138,328.10, 207,492.15 and 133,516.70 is: 200,275.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,328.10 : 207,492.15 = 133,516.70 : x
  2. Step 2: Convert to fraction form
    138,328.10/207,492.15 = 133,516.70/x
  3. Step 3: Cross multiply
    138,328.10x = 207,492.15 × 133,516.70
  4. Step 4: Simplify right side
    138,328.10x = 27,703,667,143.91
  5. Step 5: Solve for x
    x = 27,703,667,143.91/138,328.10
  6. Step 6: Final answer
    x = 200,275.05

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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.