Home / 135,390.29-186,780.74-81,644.76

Finding the Fourth Proportional to 135,390.29, 186,780.74 and 81,644.76

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Solution

The fourth proportional to 135,390.29, 186,780.74 and 81,644.76 is: 112,634.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,390.29 : 186,780.74 = 81,644.76 : x
  2. Step 2: Convert to fraction form
    135,390.29/186,780.74 = 81,644.76/x
  3. Step 3: Cross multiply
    135,390.29x = 186,780.74 × 81,644.76
  4. Step 4: Simplify right side
    135,390.29x = 15,249,668,281.70
  5. Step 5: Solve for x
    x = 15,249,668,281.70/135,390.29
  6. Step 6: Final answer
    x = 112,634.88

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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.