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Finding the Fourth Proportional to 64,003.60, 88,372.20 and 38,886.80

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Solution

The fourth proportional to 64,003.60, 88,372.20 and 38,886.80 is: 53,692.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,003.60 : 88,372.20 = 38,886.80 : x
  2. Step 2: Convert to fraction form
    64,003.60/88,372.20 = 38,886.80/x
  3. Step 3: Cross multiply
    64,003.60x = 88,372.20 × 38,886.80
  4. Step 4: Simplify right side
    64,003.60x = 3,436,512,066.96
  5. Step 5: Solve for x
    x = 3,436,512,066.96/64,003.60
  6. Step 6: Final answer
    x = 53,692.48

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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.