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Finding the Fourth Proportional to 326,437.11, 489,678.17 and 136,706.45

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Solution

The fourth proportional to 326,437.11, 489,678.17 and 136,706.45 is: 205,069.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,437.11 : 489,678.17 = 136,706.45 : x
  2. Step 2: Convert to fraction form
    326,437.11/489,678.17 = 136,706.45/x
  3. Step 3: Cross multiply
    326,437.11x = 489,678.17 × 136,706.45
  4. Step 4: Simplify right side
    326,437.11x = 66,942,161,131.27
  5. Step 5: Solve for x
    x = 66,942,161,131.27/326,437.11
  6. Step 6: Final answer
    x = 205,069.09

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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.