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Finding the Fourth Proportional to 121,758.53, 168,026.47 and 68,043.51

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Solution

The fourth proportional to 121,758.53, 168,026.47 and 68,043.51 is: 93,899.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,758.53 : 168,026.47 = 68,043.51 : x
  2. Step 2: Convert to fraction form
    121,758.53/168,026.47 = 68,043.51/x
  3. Step 3: Cross multiply
    121,758.53x = 168,026.47 × 68,043.51
  4. Step 4: Simplify right side
    121,758.53x = 11,433,110,621.60
  5. Step 5: Solve for x
    x = 11,433,110,621.60/121,758.53
  6. Step 6: Final answer
    x = 93,899.88

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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.