Home / 212,116.12-318,090.79-77,148.15

Finding the Fourth Proportional to 212,116.12, 318,090.79 and 77,148.15

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Solution

The fourth proportional to 212,116.12, 318,090.79 and 77,148.15 is: 115,691.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,116.12 : 318,090.79 = 77,148.15 : x
  2. Step 2: Convert to fraction form
    212,116.12/318,090.79 = 77,148.15/x
  3. Step 3: Cross multiply
    212,116.12x = 318,090.79 × 77,148.15
  4. Step 4: Simplify right side
    212,116.12x = 24,540,115,980.54
  5. Step 5: Solve for x
    x = 24,540,115,980.54/212,116.12
  6. Step 6: Final answer
    x = 115,691.90

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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.