Home / 136,719.08-188,686.92-76,310.72

Finding the Fourth Proportional to 136,719.08, 188,686.92 and 76,310.72

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Solution

The fourth proportional to 136,719.08, 188,686.92 and 76,310.72 is: 105,316.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,719.08 : 188,686.92 = 76,310.72 : x
  2. Step 2: Convert to fraction form
    136,719.08/188,686.92 = 76,310.72/x
  3. Step 3: Cross multiply
    136,719.08x = 188,686.92 × 76,310.72
  4. Step 4: Simplify right side
    136,719.08x = 14,398,834,719.78
  5. Step 5: Solve for x
    x = 14,398,834,719.78/136,719.08
  6. Step 6: Final answer
    x = 105,316.94

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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.