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Finding the Fourth Proportional to 351,860.51, 527,590.78 and 138,512.89

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Solution

The fourth proportional to 351,860.51, 527,590.78 and 138,512.89 is: 207,690.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,860.51 : 527,590.78 = 138,512.89 : x
  2. Step 2: Convert to fraction form
    351,860.51/527,590.78 = 138,512.89/x
  3. Step 3: Cross multiply
    351,860.51x = 527,590.78 × 138,512.89
  4. Step 4: Simplify right side
    351,860.51x = 73,078,123,675.15
  5. Step 5: Solve for x
    x = 73,078,123,675.15/351,860.51
  6. Step 6: Final answer
    x = 207,690.61

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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.