Home / 109,686.63-151,390.94-75,278.43

Finding the Fourth Proportional to 109,686.63, 151,390.94 and 75,278.43

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Solution

The fourth proportional to 109,686.63, 151,390.94 and 75,278.43 is: 103,900.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,686.63 : 151,390.94 = 75,278.43 : x
  2. Step 2: Convert to fraction form
    109,686.63/151,390.94 = 75,278.43/x
  3. Step 3: Cross multiply
    109,686.63x = 151,390.94 × 75,278.43
  4. Step 4: Simplify right side
    109,686.63x = 11,396,472,279.42
  5. Step 5: Solve for x
    x = 11,396,472,279.42/109,686.63
  6. Step 6: Final answer
    x = 103,900.29

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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.