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Finding the Fourth Proportional to 90,464.78, 124,838.44 and 54,648.54

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Solution

The fourth proportional to 90,464.78, 124,838.44 and 54,648.54 is: 75,413.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,464.78 : 124,838.44 = 54,648.54 : x
  2. Step 2: Convert to fraction form
    90,464.78/124,838.44 = 54,648.54/x
  3. Step 3: Cross multiply
    90,464.78x = 124,838.44 × 54,648.54
  4. Step 4: Simplify right side
    90,464.78x = 6,822,238,345.26
  5. Step 5: Solve for x
    x = 6,822,238,345.26/90,464.78
  6. Step 6: Final answer
    x = 75,413.20

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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.