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Finding the Fourth Proportional to 122,109.60, 183,164.40 and 86,680.20

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Solution

The fourth proportional to 122,109.60, 183,164.40 and 86,680.20 is: 130,020.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,109.60 : 183,164.40 = 86,680.20 : x
  2. Step 2: Convert to fraction form
    122,109.60/183,164.40 = 86,680.20/x
  3. Step 3: Cross multiply
    122,109.60x = 183,164.40 × 86,680.20
  4. Step 4: Simplify right side
    122,109.60x = 15,876,726,824.88
  5. Step 5: Solve for x
    x = 15,876,726,824.88/122,109.60
  6. Step 6: Final answer
    x = 130,020.30

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1.5x scale

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.