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Finding the Fourth Proportional to 72,645.04, 109,017.78 and 47,697.04

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Solution

The fourth proportional to 72,645.04, 109,017.78 and 47,697.04 is: 71,578.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,645.04 : 109,017.78 = 47,697.04 : x
  2. Step 2: Convert to fraction form
    72,645.04/109,017.78 = 47,697.04/x
  3. Step 3: Cross multiply
    72,645.04x = 109,017.78 × 47,697.04
  4. Step 4: Simplify right side
    72,645.04x = 5,199,825,413.37
  5. Step 5: Solve for x
    x = 5,199,825,413.37/72,645.04
  6. Step 6: Final answer
    x = 71,578.53

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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.