Home / 212,517.12-318,699.10-70,336.15

Finding the Fourth Proportional to 212,517.12, 318,699.10 and 70,336.15

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Solution

The fourth proportional to 212,517.12, 318,699.10 and 70,336.15 is: 105,478.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,517.12 : 318,699.10 = 70,336.15 : x
  2. Step 2: Convert to fraction form
    212,517.12/318,699.10 = 70,336.15/x
  3. Step 3: Cross multiply
    212,517.12x = 318,699.10 × 70,336.15
  4. Step 4: Simplify right side
    212,517.12x = 22,416,067,702.47
  5. Step 5: Solve for x
    x = 22,416,067,702.47/212,517.12
  6. Step 6: Final answer
    x = 105,478.88

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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.