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Finding the Fourth Proportional to 122,642.20, 183,525.90 and 85,025.80

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Solution

The fourth proportional to 122,642.20, 183,525.90 and 85,025.80 is: 127,235.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,642.20 : 183,525.90 = 85,025.80 : x
  2. Step 2: Convert to fraction form
    122,642.20/183,525.90 = 85,025.80/x
  3. Step 3: Cross multiply
    122,642.20x = 183,525.90 × 85,025.80
  4. Step 4: Simplify right side
    122,642.20x = 15,604,436,468.22
  5. Step 5: Solve for x
    x = 15,604,436,468.22/122,642.20
  6. Step 6: Final answer
    x = 127,235.46

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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.