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Finding the Fourth Proportional to 89,863.20, 124,012.80 and 49,579.20

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Solution

The fourth proportional to 89,863.20, 124,012.80 and 49,579.20 is: 68,420.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,863.20 : 124,012.80 = 49,579.20 : x
  2. Step 2: Convert to fraction form
    89,863.20/124,012.80 = 49,579.20/x
  3. Step 3: Cross multiply
    89,863.20x = 124,012.80 × 49,579.20
  4. Step 4: Simplify right side
    89,863.20x = 6,148,455,413.76
  5. Step 5: Solve for x
    x = 6,148,455,413.76/89,863.20
  6. Step 6: Final answer
    x = 68,420.17

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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.