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Finding the Fourth Proportional to 70,956.64, 106,450.62 and 21,040.72

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Solution

The fourth proportional to 70,956.64, 106,450.62 and 21,040.72 is: 31,565.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,956.64 : 106,450.62 = 21,040.72 : x
  2. Step 2: Convert to fraction form
    70,956.64/106,450.62 = 21,040.72/x
  3. Step 3: Cross multiply
    70,956.64x = 106,450.62 × 21,040.72
  4. Step 4: Simplify right side
    70,956.64x = 2,239,797,689.25
  5. Step 5: Solve for x
    x = 2,239,797,689.25/70,956.64
  6. Step 6: Final answer
    x = 31,565.72

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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.