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Finding the Fourth Proportional to 136,658.70, 205,026.45 and 66,540.30

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Solution

The fourth proportional to 136,658.70, 205,026.45 and 66,540.30 is: 99,829.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,658.70 : 205,026.45 = 66,540.30 : x
  2. Step 2: Convert to fraction form
    136,658.70/205,026.45 = 66,540.30/x
  3. Step 3: Cross multiply
    136,658.70x = 205,026.45 × 66,540.30
  4. Step 4: Simplify right side
    136,658.70x = 13,642,521,490.94
  5. Step 5: Solve for x
    x = 13,642,521,490.94/136,658.70
  6. Step 6: Final answer
    x = 99,829.15

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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.