Home / 122,109.03-168,512.15-79,643.19

Finding the Fourth Proportional to 122,109.03, 168,512.15 and 79,643.19

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Solution

The fourth proportional to 122,109.03, 168,512.15 and 79,643.19 is: 109,908.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,109.03 : 168,512.15 = 79,643.19 : x
  2. Step 2: Convert to fraction form
    122,109.03/168,512.15 = 79,643.19/x
  3. Step 3: Cross multiply
    122,109.03x = 168,512.15 × 79,643.19
  4. Step 4: Simplify right side
    122,109.03x = 13,420,844,781.54
  5. Step 5: Solve for x
    x = 13,420,844,781.54/122,109.03
  6. Step 6: Final answer
    x = 109,908.70

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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.