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Finding the Fourth Proportional to 78,560.91, 108,413.78 and 42,750.27

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Solution

The fourth proportional to 78,560.91, 108,413.78 and 42,750.27 is: 58,995.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,560.91 : 108,413.78 = 42,750.27 : x
  2. Step 2: Convert to fraction form
    78,560.91/108,413.78 = 42,750.27/x
  3. Step 3: Cross multiply
    78,560.91x = 108,413.78 × 42,750.27
  4. Step 4: Simplify right side
    78,560.91x = 4,634,718,152.97
  5. Step 5: Solve for x
    x = 4,634,718,152.97/78,560.91
  6. Step 6: Final answer
    x = 58,995.22

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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.