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Finding the Fourth Proportional to 90,155.91, 124,413.62 and 49,869.64

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Solution

The fourth proportional to 90,155.91, 124,413.62 and 49,869.64 is: 68,819.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,155.91 : 124,413.62 = 49,869.64 : x
  2. Step 2: Convert to fraction form
    90,155.91/124,413.62 = 49,869.64/x
  3. Step 3: Cross multiply
    90,155.91x = 124,413.62 × 49,869.64
  4. Step 4: Simplify right side
    90,155.91x = 6,204,462,720.69
  5. Step 5: Solve for x
    x = 6,204,462,720.69/90,155.91
  6. Step 6: Final answer
    x = 68,819.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.