Home / 257,929.15-386,948.40-77,999.80

Finding the Fourth Proportional to 257,929.15, 386,948.40 and 77,999.80

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Solution

The fourth proportional to 257,929.15, 386,948.40 and 77,999.80 is: 117,016.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,929.15 : 386,948.40 = 77,999.80 : x
  2. Step 2: Convert to fraction form
    257,929.15/386,948.40 = 77,999.80/x
  3. Step 3: Cross multiply
    257,929.15x = 386,948.40 × 77,999.80
  4. Step 4: Simplify right side
    257,929.15x = 30,181,897,810.32
  5. Step 5: Solve for x
    x = 30,181,897,810.32/257,929.15
  6. Step 6: Final answer
    x = 117,016.23

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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.