Home / 161,678.40-242,517.60-105,691.20

Finding the Fourth Proportional to 161,678.40, 242,517.60 and 105,691.20

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Solution

The fourth proportional to 161,678.40, 242,517.60 and 105,691.20 is: 158,536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,678.40 : 242,517.60 = 105,691.20 : x
  2. Step 2: Convert to fraction form
    161,678.40/242,517.60 = 105,691.20/x
  3. Step 3: Cross multiply
    161,678.40x = 242,517.60 × 105,691.20
  4. Step 4: Simplify right side
    161,678.40x = 25,631,976,165.12
  5. Step 5: Solve for x
    x = 25,631,976,165.12/161,678.40
  6. Step 6: Final answer
    x = 158,536.80

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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.