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Finding the Fourth Proportional to 129,203.66, 193,844.78 and 66,068.11

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Solution

The fourth proportional to 129,203.66, 193,844.78 and 66,068.11 is: 99,122.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,203.66 : 193,844.78 = 66,068.11 : x
  2. Step 2: Convert to fraction form
    129,203.66/193,844.78 = 66,068.11/x
  3. Step 3: Cross multiply
    129,203.66x = 193,844.78 × 66,068.11
  4. Step 4: Simplify right side
    129,203.66x = 12,806,957,317.31
  5. Step 5: Solve for x
    x = 12,806,957,317.31/129,203.66
  6. Step 6: Final answer
    x = 99,122.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.