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Finding the Fourth Proportional to 259,079.72, 388,633.51 and 81,600.62

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Solution

The fourth proportional to 259,079.72, 388,633.51 and 81,600.62 is: 122,405.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,079.72 : 388,633.51 = 81,600.62 : x
  2. Step 2: Convert to fraction form
    259,079.72/388,633.51 = 81,600.62/x
  3. Step 3: Cross multiply
    259,079.72x = 388,633.51 × 81,600.62
  4. Step 4: Simplify right side
    259,079.72x = 31,712,735,368.78
  5. Step 5: Solve for x
    x = 31,712,735,368.78/259,079.72
  6. Step 6: Final answer
    x = 122,405.32

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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.