Home / 102,942.20-154,413.30-71,449.40

Finding the Fourth Proportional to 102,942.20, 154,413.30 and 71,449.40

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Solution

The fourth proportional to 102,942.20, 154,413.30 and 71,449.40 is: 107,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,942.20 : 154,413.30 = 71,449.40 : x
  2. Step 2: Convert to fraction form
    102,942.20/154,413.30 = 71,449.40/x
  3. Step 3: Cross multiply
    102,942.20x = 154,413.30 × 71,449.40
  4. Step 4: Simplify right side
    102,942.20x = 11,032,737,637.02
  5. Step 5: Solve for x
    x = 11,032,737,637.02/102,942.20
  6. Step 6: Final answer
    x = 107,174.10

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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.