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Finding the Fourth Proportional to 79,775.30, 110,129.28 and 54,413.40

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Solution

The fourth proportional to 79,775.30, 110,129.28 and 54,413.40 is: 75,117.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,775.30 : 110,129.28 = 54,413.40 : x
  2. Step 2: Convert to fraction form
    79,775.30/110,129.28 = 54,413.40/x
  3. Step 3: Cross multiply
    79,775.30x = 110,129.28 × 54,413.40
  4. Step 4: Simplify right side
    79,775.30x = 5,992,508,564.35
  5. Step 5: Solve for x
    x = 5,992,508,564.35/79,775.30
  6. Step 6: Final answer
    x = 75,117.34

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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.