Home / 157,985.76-217,879.20-131,085.72

Finding the Fourth Proportional to 157,985.76, 217,879.20 and 131,085.72

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Solution

The fourth proportional to 157,985.76, 217,879.20 and 131,085.72 is: 180,781.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,985.76 : 217,879.20 = 131,085.72 : x
  2. Step 2: Convert to fraction form
    157,985.76/217,879.20 = 131,085.72/x
  3. Step 3: Cross multiply
    157,985.76x = 217,879.20 × 131,085.72
  4. Step 4: Simplify right side
    157,985.76x = 28,560,851,805.02
  5. Step 5: Solve for x
    x = 28,560,851,805.02/157,985.76
  6. Step 6: Final answer
    x = 180,781.18

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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.