Home / 212,720.30-319,080.45-118,241.90

Finding the Fourth Proportional to 212,720.30, 319,080.45 and 118,241.90

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Solution

The fourth proportional to 212,720.30, 319,080.45 and 118,241.90 is: 177,362.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,720.30 : 319,080.45 = 118,241.90 : x
  2. Step 2: Convert to fraction form
    212,720.30/319,080.45 = 118,241.90/x
  3. Step 3: Cross multiply
    212,720.30x = 319,080.45 × 118,241.90
  4. Step 4: Simplify right side
    212,720.30x = 37,728,678,660.86
  5. Step 5: Solve for x
    x = 37,728,678,660.86/212,720.30
  6. Step 6: Final answer
    x = 177,362.85

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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.