Home / 136,402.40-188,244.78-82,689.68

Finding the Fourth Proportional to 136,402.40, 188,244.78 and 82,689.68

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Solution

The fourth proportional to 136,402.40, 188,244.78 and 82,689.68 is: 114,117.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,402.40 : 188,244.78 = 82,689.68 : x
  2. Step 2: Convert to fraction form
    136,402.40/188,244.78 = 82,689.68/x
  3. Step 3: Cross multiply
    136,402.40x = 188,244.78 × 82,689.68
  4. Step 4: Simplify right side
    136,402.40x = 15,565,900,780.40
  5. Step 5: Solve for x
    x = 15,565,900,780.40/136,402.40
  6. Step 6: Final answer
    x = 114,117.50

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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.