Home / 138,964.20-208,292.70-76,679.40

Finding the Fourth Proportional to 138,964.20, 208,292.70 and 76,679.40

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Solution

The fourth proportional to 138,964.20, 208,292.70 and 76,679.40 is: 114,934.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,964.20 : 208,292.70 = 76,679.40 : x
  2. Step 2: Convert to fraction form
    138,964.20/208,292.70 = 76,679.40/x
  3. Step 3: Cross multiply
    138,964.20x = 208,292.70 × 76,679.40
  4. Step 4: Simplify right side
    138,964.20x = 15,971,759,260.38
  5. Step 5: Solve for x
    x = 15,971,759,260.38/138,964.20
  6. Step 6: Final answer
    x = 114,934.34

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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.