Home / 212,862.40-319,336.80-72,635.20

Finding the Fourth Proportional to 212,862.40, 319,336.80 and 72,635.20

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Solution

The fourth proportional to 212,862.40, 319,336.80 and 72,635.20 is: 108,967.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,862.40 : 319,336.80 = 72,635.20 : x
  2. Step 2: Convert to fraction form
    212,862.40/319,336.80 = 72,635.20/x
  3. Step 3: Cross multiply
    212,862.40x = 319,336.80 × 72,635.20
  4. Step 4: Simplify right side
    212,862.40x = 23,195,092,335.36
  5. Step 5: Solve for x
    x = 23,195,092,335.36/212,862.40
  6. Step 6: Final answer
    x = 108,967.54

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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.