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Finding the Fourth Proportional to 122,290.69, 168,785.35 and 79,323.43

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Solution

The fourth proportional to 122,290.69, 168,785.35 and 79,323.43 is: 109,482.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,290.69 : 168,785.35 = 79,323.43 : x
  2. Step 2: Convert to fraction form
    122,290.69/168,785.35 = 79,323.43/x
  3. Step 3: Cross multiply
    122,290.69x = 168,785.35 × 79,323.43
  4. Step 4: Simplify right side
    122,290.69x = 13,388,631,655.21
  5. Step 5: Solve for x
    x = 13,388,631,655.21/122,290.69
  6. Step 6: Final answer
    x = 109,482.02

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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.