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Finding the Fourth Proportional to 122,425.60, 183,638.40 and 85,100.80

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Solution

The fourth proportional to 122,425.60, 183,638.40 and 85,100.80 is: 127,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,425.60 : 183,638.40 = 85,100.80 : x
  2. Step 2: Convert to fraction form
    122,425.60/183,638.40 = 85,100.80/x
  3. Step 3: Cross multiply
    122,425.60x = 183,638.40 × 85,100.80
  4. Step 4: Simplify right side
    122,425.60x = 15,627,774,750.72
  5. Step 5: Solve for x
    x = 15,627,774,750.72/122,425.60
  6. Step 6: Final answer
    x = 127,651.20

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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.