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Finding the Fourth Proportional to 107,291.20, 160,936.80 and 28,413.40

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Solution

The fourth proportional to 107,291.20, 160,936.80 and 28,413.40 is: 42,620.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,291.20 : 160,936.80 = 28,413.40 : x
  2. Step 2: Convert to fraction form
    107,291.20/160,936.80 = 28,413.40/x
  3. Step 3: Cross multiply
    107,291.20x = 160,936.80 × 28,413.40
  4. Step 4: Simplify right side
    107,291.20x = 4,572,761,673.12
  5. Step 5: Solve for x
    x = 4,572,761,673.12/107,291.20
  6. Step 6: Final answer
    x = 42,620.10

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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.