Home / 53,839.40-80,730.30-18,780.20

Finding the Fourth Proportional to 53,839.40, 80,730.30 and 18,780.20

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Solution

The fourth proportional to 53,839.40, 80,730.30 and 18,780.20 is: 28,160.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,839.40 : 80,730.30 = 18,780.20 : x
  2. Step 2: Convert to fraction form
    53,839.40/80,730.30 = 18,780.20/x
  3. Step 3: Cross multiply
    53,839.40x = 80,730.30 × 18,780.20
  4. Step 4: Simplify right side
    53,839.40x = 1,516,131,180.06
  5. Step 5: Solve for x
    x = 1,516,131,180.06/53,839.40
  6. Step 6: Final answer
    x = 28,160.25

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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.