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Finding the Fourth Proportional to 253,876.26, 380,833.19 and 85,395.93

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Solution

The fourth proportional to 253,876.26, 380,833.19 and 85,395.93 is: 128,100.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,876.26 : 380,833.19 = 85,395.93 : x
  2. Step 2: Convert to fraction form
    253,876.26/380,833.19 = 85,395.93/x
  3. Step 3: Cross multiply
    253,876.26x = 380,833.19 × 85,395.93
  4. Step 4: Simplify right side
    253,876.26x = 32,521,604,007.94
  5. Step 5: Solve for x
    x = 32,521,604,007.94/253,876.26
  6. Step 6: Final answer
    x = 128,100.22

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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.