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Finding the Fourth Proportional to 207,516.10, 311,312.55 and 67,279.30

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Solution

The fourth proportional to 207,516.10, 311,312.55 and 67,279.30 is: 100,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,516.10 : 311,312.55 = 67,279.30 : x
  2. Step 2: Convert to fraction form
    207,516.10/311,312.55 = 67,279.30/x
  3. Step 3: Cross multiply
    207,516.10x = 311,312.55 × 67,279.30
  4. Step 4: Simplify right side
    207,516.10x = 20,944,890,445.22
  5. Step 5: Solve for x
    x = 20,944,890,445.22/207,516.10
  6. Step 6: Final answer
    x = 100,931.40

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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.