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Finding the Fourth Proportional to 207,615.10, 311,307.45 and 82,815.10

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Solution

The fourth proportional to 207,615.10, 311,307.45 and 82,815.10 is: 124,176.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,615.10 : 311,307.45 = 82,815.10 : x
  2. Step 2: Convert to fraction form
    207,615.10/311,307.45 = 82,815.10/x
  3. Step 3: Cross multiply
    207,615.10x = 311,307.45 × 82,815.10
  4. Step 4: Simplify right side
    207,615.10x = 25,780,957,602.50
  5. Step 5: Solve for x
    x = 25,780,957,602.50/207,615.10
  6. Step 6: Final answer
    x = 124,176.70

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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.