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Finding the Fourth Proportional to 121,305.71, 167,402.54 and 70,348.65

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Solution

The fourth proportional to 121,305.71, 167,402.54 and 70,348.65 is: 97,081.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,305.71 : 167,402.54 = 70,348.65 : x
  2. Step 2: Convert to fraction form
    121,305.71/167,402.54 = 70,348.65/x
  3. Step 3: Cross multiply
    121,305.71x = 167,402.54 × 70,348.65
  4. Step 4: Simplify right side
    121,305.71x = 11,776,541,506.82
  5. Step 5: Solve for x
    x = 11,776,541,506.82/121,305.71
  6. Step 6: Final answer
    x = 97,081.51

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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.