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Finding the Fourth Proportional to 120,148.80, 165,801.60 and 66,433.60

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Solution

The fourth proportional to 120,148.80, 165,801.60 and 66,433.60 is: 91,676.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,148.80 : 165,801.60 = 66,433.60 : x
  2. Step 2: Convert to fraction form
    120,148.80/165,801.60 = 66,433.60/x
  3. Step 3: Cross multiply
    120,148.80x = 165,801.60 × 66,433.60
  4. Step 4: Simplify right side
    120,148.80x = 11,014,797,173.76
  5. Step 5: Solve for x
    x = 11,014,797,173.76/120,148.80
  6. Step 6: Final answer
    x = 91,676.30

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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.