Home / 137,720.40-206,143.20-127,222.80

Finding the Fourth Proportional to 137,720.40, 206,143.20 and 127,222.80

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Solution

The fourth proportional to 137,720.40, 206,143.20 and 127,222.80 is: 190,430.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,720.40 : 206,143.20 = 127,222.80 : x
  2. Step 2: Convert to fraction form
    137,720.40/206,143.20 = 127,222.80/x
  3. Step 3: Cross multiply
    137,720.40x = 206,143.20 × 127,222.80
  4. Step 4: Simplify right side
    137,720.40x = 26,226,115,104.96
  5. Step 5: Solve for x
    x = 26,226,115,104.96/137,720.40
  6. Step 6: Final answer
    x = 190,430.14

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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.