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Finding the Fourth Proportional to 64,604.80, 96,781.20 and 36,438.40

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Solution

The fourth proportional to 64,604.80, 96,781.20 and 36,438.40 is: 54,586.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,604.80 : 96,781.20 = 36,438.40 : x
  2. Step 2: Convert to fraction form
    64,604.80/96,781.20 = 36,438.40/x
  3. Step 3: Cross multiply
    64,604.80x = 96,781.20 × 36,438.40
  4. Step 4: Simplify right side
    64,604.80x = 3,526,552,078.08
  5. Step 5: Solve for x
    x = 3,526,552,078.08/64,604.80
  6. Step 6: Final answer
    x = 54,586.53

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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.