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Finding the Fourth Proportional to 207,272.16, 310,861.80 and 80,915.40

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Solution

The fourth proportional to 207,272.16, 310,861.80 and 80,915.40 is: 121,354.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,272.16 : 310,861.80 = 80,915.40 : x
  2. Step 2: Convert to fraction form
    207,272.16/310,861.80 = 80,915.40/x
  3. Step 3: Cross multiply
    207,272.16x = 310,861.80 × 80,915.40
  4. Step 4: Simplify right side
    207,272.16x = 25,153,506,891.72
  5. Step 5: Solve for x
    x = 25,153,506,891.72/207,272.16
  6. Step 6: Final answer
    x = 121,354.97

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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.