Home / 90,714.78-125,117.10-80,516.52

Finding the Fourth Proportional to 90,714.78, 125,117.10 and 80,516.52

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Solution

The fourth proportional to 90,714.78, 125,117.10 and 80,516.52 is: 111,051.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,714.78 : 125,117.10 = 80,516.52 : x
  2. Step 2: Convert to fraction form
    90,714.78/125,117.10 = 80,516.52/x
  3. Step 3: Cross multiply
    90,714.78x = 125,117.10 × 80,516.52
  4. Step 4: Simplify right side
    90,714.78x = 10,073,993,484.49
  5. Step 5: Solve for x
    x = 10,073,993,484.49/90,714.78
  6. Step 6: Final answer
    x = 111,051.29

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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.