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Finding the Fourth Proportional to 326,537.88, 489,996 and 136,981.50

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Solution

The fourth proportional to 326,537.88, 489,996 and 136,981.50 is: 205,551.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,537.88 : 489,996 = 136,981.50 : x
  2. Step 2: Convert to fraction form
    326,537.88/489,996 = 136,981.50/x
  3. Step 3: Cross multiply
    326,537.88x = 489,996 × 136,981.50
  4. Step 4: Simplify right side
    326,537.88x = 67,120,387,074
  5. Step 5: Solve for x
    x = 67,120,387,074/326,537.88
  6. Step 6: Final answer
    x = 205,551.61

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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.