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Finding the Fourth Proportional to 72,575.64, 108,905.50 and 30,452

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Solution

The fourth proportional to 72,575.64, 108,905.50 and 30,452 is: 45,695.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,575.64 : 108,905.50 = 30,452 : x
  2. Step 2: Convert to fraction form
    72,575.64/108,905.50 = 30,452/x
  3. Step 3: Cross multiply
    72,575.64x = 108,905.50 × 30,452
  4. Step 4: Simplify right side
    72,575.64x = 3,316,390,286
  5. Step 5: Solve for x
    x = 3,316,390,286/72,575.64
  6. Step 6: Final answer
    x = 45,695.64

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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.