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Finding the Fourth Proportional to 326,117.78, 489,172.10 and 113,040.80

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Solution

The fourth proportional to 326,117.78, 489,172.10 and 113,040.80 is: 169,559.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,117.78 : 489,172.10 = 113,040.80 : x
  2. Step 2: Convert to fraction form
    326,117.78/489,172.10 = 113,040.80/x
  3. Step 3: Cross multiply
    326,117.78x = 489,172.10 × 113,040.80
  4. Step 4: Simplify right side
    326,117.78x = 55,296,402,510.62
  5. Step 5: Solve for x
    x = 55,296,402,510.62/326,117.78
  6. Step 6: Final answer
    x = 169,559.61

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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.