Home / 136,713.87-188,681.45-80,125.20

Finding the Fourth Proportional to 136,713.87, 188,681.45 and 80,125.20

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Solution

The fourth proportional to 136,713.87, 188,681.45 and 80,125.20 is: 110,582.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,713.87 : 188,681.45 = 80,125.20 : x
  2. Step 2: Convert to fraction form
    136,713.87/188,681.45 = 80,125.20/x
  3. Step 3: Cross multiply
    136,713.87x = 188,681.45 × 80,125.20
  4. Step 4: Simplify right side
    136,713.87x = 15,118,138,516.91
  5. Step 5: Solve for x
    x = 15,118,138,516.91/136,713.87
  6. Step 6: Final answer
    x = 110,582.33

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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.