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Finding the Fourth Proportional to 120,249.01, 165,871.35 and 79,413.51

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Solution

The fourth proportional to 120,249.01, 165,871.35 and 79,413.51 is: 109,542.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,249.01 : 165,871.35 = 79,413.51 : x
  2. Step 2: Convert to fraction form
    120,249.01/165,871.35 = 79,413.51/x
  3. Step 3: Cross multiply
    120,249.01x = 165,871.35 × 79,413.51
  4. Step 4: Simplify right side
    120,249.01x = 13,172,426,111.94
  5. Step 5: Solve for x
    x = 13,172,426,111.94/120,249.01
  6. Step 6: Final answer
    x = 109,542.91

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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.