Home / 100,508.46-138,703.50-55,190.72

Finding the Fourth Proportional to 100,508.46, 138,703.50 and 55,190.72

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Solution

The fourth proportional to 100,508.46, 138,703.50 and 55,190.72 is: 76,164.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,508.46 : 138,703.50 = 55,190.72 : x
  2. Step 2: Convert to fraction form
    100,508.46/138,703.50 = 55,190.72/x
  3. Step 3: Cross multiply
    100,508.46x = 138,703.50 × 55,190.72
  4. Step 4: Simplify right side
    100,508.46x = 7,655,146,031.52
  5. Step 5: Solve for x
    x = 7,655,146,031.52/100,508.46
  6. Step 6: Final answer
    x = 76,164.20

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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.