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Finding the Fourth Proportional to 165,697.60, 248,546.40 and 72,385.60

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Solution

The fourth proportional to 165,697.60, 248,546.40 and 72,385.60 is: 108,578.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,697.60 : 248,546.40 = 72,385.60 : x
  2. Step 2: Convert to fraction form
    165,697.60/248,546.40 = 72,385.60/x
  3. Step 3: Cross multiply
    165,697.60x = 248,546.40 × 72,385.60
  4. Step 4: Simplify right side
    165,697.60x = 17,991,180,291.84
  5. Step 5: Solve for x
    x = 17,991,180,291.84/165,697.60
  6. Step 6: Final answer
    x = 108,578.40

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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.