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Finding the Fourth Proportional to 326,113.20, 489,117.42 and 89,400.96

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Solution

The fourth proportional to 326,113.20, 489,117.42 and 89,400.96 is: 134,087.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,113.20 : 489,117.42 = 89,400.96 : x
  2. Step 2: Convert to fraction form
    326,113.20/489,117.42 = 89,400.96/x
  3. Step 3: Cross multiply
    326,113.20x = 489,117.42 × 89,400.96
  4. Step 4: Simplify right side
    326,113.20x = 43,727,566,900.72
  5. Step 5: Solve for x
    x = 43,727,566,900.72/326,113.20
  6. Step 6: Final answer
    x = 134,087.08

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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.