Home / 136,891.70-205,338.12-42,121.28

Finding the Fourth Proportional to 136,891.70, 205,338.12 and 42,121.28

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Solution

The fourth proportional to 136,891.70, 205,338.12 and 42,121.28 is: 63,182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,891.70 : 205,338.12 = 42,121.28 : x
  2. Step 2: Convert to fraction form
    136,891.70/205,338.12 = 42,121.28/x
  3. Step 3: Cross multiply
    136,891.70x = 205,338.12 × 42,121.28
  4. Step 4: Simplify right side
    136,891.70x = 8,649,104,447.19
  5. Step 5: Solve for x
    x = 8,649,104,447.19/136,891.70
  6. Step 6: Final answer
    x = 63,182.10

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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.