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Finding the Fourth Proportional to 70,956.79, 106,452.70 and 21,036.89

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Solution

The fourth proportional to 70,956.79, 106,452.70 and 21,036.89 is: 31,560.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,956.79 : 106,452.70 = 21,036.89 : x
  2. Step 2: Convert to fraction form
    70,956.79/106,452.70 = 21,036.89/x
  3. Step 3: Cross multiply
    70,956.79x = 106,452.70 × 21,036.89
  4. Step 4: Simplify right side
    70,956.79x = 2,239,433,205.15
  5. Step 5: Solve for x
    x = 2,239,433,205.15/70,956.79
  6. Step 6: Final answer
    x = 31,560.52

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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.