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Finding the Fourth Proportional to 253,557.75, 349,908.42 and 138,834.31

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Solution

The fourth proportional to 253,557.75, 349,908.42 and 138,834.31 is: 191,590.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,557.75 : 349,908.42 = 138,834.31 : x
  2. Step 2: Convert to fraction form
    253,557.75/349,908.42 = 138,834.31/x
  3. Step 3: Cross multiply
    253,557.75x = 349,908.42 × 138,834.31
  4. Step 4: Simplify right side
    253,557.75x = 48,579,294,053.89
  5. Step 5: Solve for x
    x = 48,579,294,053.89/253,557.75
  6. Step 6: Final answer
    x = 191,590.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.