Home / 121,731.26-168,104.16-115,104.65

Finding the Fourth Proportional to 121,731.26, 168,104.16 and 115,104.65

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Solution

The fourth proportional to 121,731.26, 168,104.16 and 115,104.65 is: 158,953.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,731.26 : 168,104.16 = 115,104.65 : x
  2. Step 2: Convert to fraction form
    121,731.26/168,104.16 = 115,104.65/x
  3. Step 3: Cross multiply
    121,731.26x = 168,104.16 × 115,104.65
  4. Step 4: Simplify right side
    121,731.26x = 19,349,569,659.82
  5. Step 5: Solve for x
    x = 19,349,569,659.82/121,731.26
  6. Step 6: Final answer
    x = 158,953.18

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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.