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Finding the Fourth Proportional to 122,305.65, 168,625.56 and 79,209.00

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Solution

The fourth proportional to 122,305.65, 168,625.56 and 79,209.00 is: 109,207.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,305.65 : 168,625.56 = 79,209.00 : x
  2. Step 2: Convert to fraction form
    122,305.65/168,625.56 = 79,209.00/x
  3. Step 3: Cross multiply
    122,305.65x = 168,625.56 × 79,209.00
  4. Step 4: Simplify right side
    122,305.65x = 13,356,660,742.87
  5. Step 5: Solve for x
    x = 13,356,660,742.87/122,305.65
  6. Step 6: Final answer
    x = 109,207.23

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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.