Home / 83,139.03-124,707.69-20,809.53

Finding the Fourth Proportional to 83,139.03, 124,707.69 and 20,809.53

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Solution

The fourth proportional to 83,139.03, 124,707.69 and 20,809.53 is: 31,214.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,139.03 : 124,707.69 = 20,809.53 : x
  2. Step 2: Convert to fraction form
    83,139.03/124,707.69 = 20,809.53/x
  3. Step 3: Cross multiply
    83,139.03x = 124,707.69 × 20,809.53
  4. Step 4: Simplify right side
    83,139.03x = 2,595,108,416.29
  5. Step 5: Solve for x
    x = 2,595,108,416.29/83,139.03
  6. Step 6: Final answer
    x = 31,214.08

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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.