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Finding the Fourth Proportional to 122,649.60, 183,974.40 and 80,659.20

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Solution

The fourth proportional to 122,649.60, 183,974.40 and 80,659.20 is: 120,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,649.60 : 183,974.40 = 80,659.20 : x
  2. Step 2: Convert to fraction form
    122,649.60/183,974.40 = 80,659.20/x
  3. Step 3: Cross multiply
    122,649.60x = 183,974.40 × 80,659.20
  4. Step 4: Simplify right side
    122,649.60x = 14,839,227,924.48
  5. Step 5: Solve for x
    x = 14,839,227,924.48/122,649.60
  6. Step 6: Final answer
    x = 120,988.80

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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.