Home / 212,921.60-319,382.40-142,419.20

Finding the Fourth Proportional to 212,921.60, 319,382.40 and 142,419.20

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Solution

The fourth proportional to 212,921.60, 319,382.40 and 142,419.20 is: 213,628.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,921.60 : 319,382.40 = 142,419.20 : x
  2. Step 2: Convert to fraction form
    212,921.60/319,382.40 = 142,419.20/x
  3. Step 3: Cross multiply
    212,921.60x = 319,382.40 × 142,419.20
  4. Step 4: Simplify right side
    212,921.60x = 45,486,185,902.08
  5. Step 5: Solve for x
    x = 45,486,185,902.08/212,921.60
  6. Step 6: Final answer
    x = 213,628.80

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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.