Home / 166,387.20-249,489.40-81,961.60

Finding the Fourth Proportional to 166,387.20, 249,489.40 and 81,961.60

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Solution

The fourth proportional to 166,387.20, 249,489.40 and 81,961.60 is: 122,897.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,387.20 : 249,489.40 = 81,961.60 : x
  2. Step 2: Convert to fraction form
    166,387.20/249,489.40 = 81,961.60/x
  3. Step 3: Cross multiply
    166,387.20x = 249,489.40 × 81,961.60
  4. Step 4: Simplify right side
    166,387.20x = 20,448,550,407.04
  5. Step 5: Solve for x
    x = 20,448,550,407.04/166,387.20
  6. Step 6: Final answer
    x = 122,897.38

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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.