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Finding the Fourth Proportional to 78,411.38, 108,199.88 and 44,413.08

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Solution

The fourth proportional to 78,411.38, 108,199.88 and 44,413.08 is: 61,285.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,411.38 : 108,199.88 = 44,413.08 : x
  2. Step 2: Convert to fraction form
    78,411.38/108,199.88 = 44,413.08/x
  3. Step 3: Cross multiply
    78,411.38x = 108,199.88 × 44,413.08
  4. Step 4: Simplify right side
    78,411.38x = 4,805,489,926.43
  5. Step 5: Solve for x
    x = 4,805,489,926.43/78,411.38
  6. Step 6: Final answer
    x = 61,285.62

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1.5x scale

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.