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Finding the Fourth Proportional to 138,060.30, 207,199.80 and 53,860.80

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Solution

The fourth proportional to 138,060.30, 207,199.80 and 53,860.80 is: 80,833.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,060.30 : 207,199.80 = 53,860.80 : x
  2. Step 2: Convert to fraction form
    138,060.30/207,199.80 = 53,860.80/x
  3. Step 3: Cross multiply
    138,060.30x = 207,199.80 × 53,860.80
  4. Step 4: Simplify right side
    138,060.30x = 11,159,946,987.84
  5. Step 5: Solve for x
    x = 11,159,946,987.84/138,060.30
  6. Step 6: Final answer
    x = 80,833.86

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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.