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Finding the Fourth Proportional to 59,976.86, 90,019.71 and 31,920.54

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Solution

The fourth proportional to 59,976.86, 90,019.71 and 31,920.54 is: 47,909.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,976.86 : 90,019.71 = 31,920.54 : x
  2. Step 2: Convert to fraction form
    59,976.86/90,019.71 = 31,920.54/x
  3. Step 3: Cross multiply
    59,976.86x = 90,019.71 × 31,920.54
  4. Step 4: Simplify right side
    59,976.86x = 2,873,477,753.84
  5. Step 5: Solve for x
    x = 2,873,477,753.84/59,976.86
  6. Step 6: Final answer
    x = 47,909.78

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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.