Home / 90,729.15-135,929.70-55,627.80

Finding the Fourth Proportional to 90,729.15, 135,929.70 and 55,627.80

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Solution

The fourth proportional to 90,729.15, 135,929.70 and 55,627.80 is: 83,341.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,729.15 : 135,929.70 = 55,627.80 : x
  2. Step 2: Convert to fraction form
    90,729.15/135,929.70 = 55,627.80/x
  3. Step 3: Cross multiply
    90,729.15x = 135,929.70 × 55,627.80
  4. Step 4: Simplify right side
    90,729.15x = 7,561,470,165.66
  5. Step 5: Solve for x
    x = 7,561,470,165.66/90,729.15
  6. Step 6: Final answer
    x = 83,341.13

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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.