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Finding the Fourth Proportional to 70,956.64, 106,434.96 and 39,351.76

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Solution

The fourth proportional to 70,956.64, 106,434.96 and 39,351.76 is: 59,027.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,956.64 : 106,434.96 = 39,351.76 : x
  2. Step 2: Convert to fraction form
    70,956.64/106,434.96 = 39,351.76/x
  3. Step 3: Cross multiply
    70,956.64x = 106,434.96 × 39,351.76
  4. Step 4: Simplify right side
    70,956.64x = 4,188,403,001.53
  5. Step 5: Solve for x
    x = 4,188,403,001.53/70,956.64
  6. Step 6: Final answer
    x = 59,027.64

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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.