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Finding the Fourth Proportional to 70,957.79, 106,454.20 and 21,037.89

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Solution

The fourth proportional to 70,957.79, 106,454.20 and 21,037.89 is: 31,562.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,957.79 : 106,454.20 = 21,037.89 : x
  2. Step 2: Convert to fraction form
    70,957.79/106,454.20 = 21,037.89/x
  3. Step 3: Cross multiply
    70,957.79x = 106,454.20 × 21,037.89
  4. Step 4: Simplify right side
    70,957.79x = 2,239,571,749.64
  5. Step 5: Solve for x
    x = 2,239,571,749.64/70,957.79
  6. Step 6: Final answer
    x = 31,562.03

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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.