Home / 138,751.20-191,559-91,088.08

Finding the Fourth Proportional to 138,751.20, 191,559 and 91,088.08

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Solution

The fourth proportional to 138,751.20, 191,559 and 91,088.08 is: 125,755.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,751.20 : 191,559 = 91,088.08 : x
  2. Step 2: Convert to fraction form
    138,751.20/191,559 = 91,088.08/x
  3. Step 3: Cross multiply
    138,751.20x = 191,559 × 91,088.08
  4. Step 4: Simplify right side
    138,751.20x = 17,448,741,516.72
  5. Step 5: Solve for x
    x = 17,448,741,516.72/138,751.20
  6. Step 6: Final answer
    x = 125,755.61

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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.