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Finding the Fourth Proportional to 122,072.40, 168,458.40 and 74,325.60

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Solution

The fourth proportional to 122,072.40, 168,458.40 and 74,325.60 is: 102,568.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,072.40 : 168,458.40 = 74,325.60 : x
  2. Step 2: Convert to fraction form
    122,072.40/168,458.40 = 74,325.60/x
  3. Step 3: Cross multiply
    122,072.40x = 168,458.40 × 74,325.60
  4. Step 4: Simplify right side
    122,072.40x = 12,520,771,655.04
  5. Step 5: Solve for x
    x = 12,520,771,655.04/122,072.40
  6. Step 6: Final answer
    x = 102,568.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.