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Finding the Fourth Proportional to 122,820.20, 183,792.90 and 85,203.80

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Solution

The fourth proportional to 122,820.20, 183,792.90 and 85,203.80 is: 127,502.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,820.20 : 183,792.90 = 85,203.80 : x
  2. Step 2: Convert to fraction form
    122,820.20/183,792.90 = 85,203.80/x
  3. Step 3: Cross multiply
    122,820.20x = 183,792.90 × 85,203.80
  4. Step 4: Simplify right side
    122,820.20x = 15,659,853,493.02
  5. Step 5: Solve for x
    x = 15,659,853,493.02/122,820.20
  6. Step 6: Final answer
    x = 127,502.26

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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.