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Finding the Fourth Proportional to 72,665.64, 109,013.40 and 30,520.92

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Solution

The fourth proportional to 72,665.64, 109,013.40 and 30,520.92 is: 45,787.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,665.64 : 109,013.40 = 30,520.92 : x
  2. Step 2: Convert to fraction form
    72,665.64/109,013.40 = 30,520.92/x
  3. Step 3: Cross multiply
    72,665.64x = 109,013.40 × 30,520.92
  4. Step 4: Simplify right side
    72,665.64x = 3,327,189,260.33
  5. Step 5: Solve for x
    x = 3,327,189,260.33/72,665.64
  6. Step 6: Final answer
    x = 45,787.66

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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.