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Finding the Fourth Proportional to 326,133.70, 489,148.11 and 89,421.46

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Solution

The fourth proportional to 326,133.70, 489,148.11 and 89,421.46 is: 134,117.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,133.70 : 489,148.11 = 89,421.46 : x
  2. Step 2: Convert to fraction form
    326,133.70/489,148.11 = 89,421.46/x
  3. Step 3: Cross multiply
    326,133.70x = 489,148.11 × 89,421.46
  4. Step 4: Simplify right side
    326,133.70x = 43,740,338,152.44
  5. Step 5: Solve for x
    x = 43,740,338,152.44/326,133.70
  6. Step 6: Final answer
    x = 134,117.81

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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.