Home / 83,111.06-124,666.59-20,781.56

Finding the Fourth Proportional to 83,111.06, 124,666.59 and 20,781.56

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Solution

The fourth proportional to 83,111.06, 124,666.59 and 20,781.56 is: 31,172.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,111.06 : 124,666.59 = 20,781.56 : x
  2. Step 2: Convert to fraction form
    83,111.06/124,666.59 = 20,781.56/x
  3. Step 3: Cross multiply
    83,111.06x = 124,666.59 × 20,781.56
  4. Step 4: Simplify right side
    83,111.06x = 2,590,766,220.08
  5. Step 5: Solve for x
    x = 2,590,766,220.08/83,111.06
  6. Step 6: Final answer
    x = 31,172.34

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1.5x scale

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.