Home / 212,731.40-319,097.10-72,494.60

Finding the Fourth Proportional to 212,731.40, 319,097.10 and 72,494.60

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Solution

The fourth proportional to 212,731.40, 319,097.10 and 72,494.60 is: 108,741.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,731.40 : 319,097.10 = 72,494.60 : x
  2. Step 2: Convert to fraction form
    212,731.40/319,097.10 = 72,494.60/x
  3. Step 3: Cross multiply
    212,731.40x = 319,097.10 × 72,494.60
  4. Step 4: Simplify right side
    212,731.40x = 23,132,816,625.66
  5. Step 5: Solve for x
    x = 23,132,816,625.66/212,731.40
  6. Step 6: Final answer
    x = 108,741.90

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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.