Home / 278,999.29-385,049.12-158,127.60

Finding the Fourth Proportional to 278,999.29, 385,049.12 and 158,127.60

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Solution

The fourth proportional to 278,999.29, 385,049.12 and 158,127.60 is: 218,233.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,999.29 : 385,049.12 = 158,127.60 : x
  2. Step 2: Convert to fraction form
    278,999.29/385,049.12 = 158,127.60/x
  3. Step 3: Cross multiply
    278,999.29x = 385,049.12 × 158,127.60
  4. Step 4: Simplify right side
    278,999.29x = 60,886,893,227.71
  5. Step 5: Solve for x
    x = 60,886,893,227.71/278,999.29
  6. Step 6: Final answer
    x = 218,233.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.