Home / 100,819.15-139,129.36-55,496.16

Finding the Fourth Proportional to 100,819.15, 139,129.36 and 55,496.16

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Solution

The fourth proportional to 100,819.15, 139,129.36 and 55,496.16 is: 76,584.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,819.15 : 139,129.36 = 55,496.16 : x
  2. Step 2: Convert to fraction form
    100,819.15/139,129.36 = 55,496.16/x
  3. Step 3: Cross multiply
    100,819.15x = 139,129.36 × 55,496.16
  4. Step 4: Simplify right side
    100,819.15x = 7,721,145,084.52
  5. Step 5: Solve for x
    x = 7,721,145,084.52/100,819.15
  6. Step 6: Final answer
    x = 76,584.11

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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.