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Finding the Fourth Proportional to 140,413.80, 210,620.70 and 87,269.70

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Solution

The fourth proportional to 140,413.80, 210,620.70 and 87,269.70 is: 130,904.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,413.80 : 210,620.70 = 87,269.70 : x
  2. Step 2: Convert to fraction form
    140,413.80/210,620.70 = 87,269.70/x
  3. Step 3: Cross multiply
    140,413.80x = 210,620.70 × 87,269.70
  4. Step 4: Simplify right side
    140,413.80x = 18,380,805,302.79
  5. Step 5: Solve for x
    x = 18,380,805,302.79/140,413.80
  6. Step 6: Final answer
    x = 130,904.55

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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.