Home / 100,821.24-151,343.64-85,220.10

Finding the Fourth Proportional to 100,821.24, 151,343.64 and 85,220.10

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Solution

The fourth proportional to 100,821.24, 151,343.64 and 85,220.10 is: 127,924.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,821.24 : 151,343.64 = 85,220.10 : x
  2. Step 2: Convert to fraction form
    100,821.24/151,343.64 = 85,220.10/x
  3. Step 3: Cross multiply
    100,821.24x = 151,343.64 × 85,220.10
  4. Step 4: Simplify right side
    100,821.24x = 12,897,520,135.16
  5. Step 5: Solve for x
    x = 12,897,520,135.16/100,821.24
  6. Step 6: Final answer
    x = 127,924.63

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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.