Home / 71,890.91-107,836.35-21,970.58

Finding the Fourth Proportional to 71,890.91, 107,836.35 and 21,970.58

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Solution

The fourth proportional to 71,890.91, 107,836.35 and 21,970.58 is: 32,955.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,890.91 : 107,836.35 = 21,970.58 : x
  2. Step 2: Convert to fraction form
    71,890.91/107,836.35 = 21,970.58/x
  3. Step 3: Cross multiply
    71,890.91x = 107,836.35 × 21,970.58
  4. Step 4: Simplify right side
    71,890.91x = 2,369,227,019.79
  5. Step 5: Solve for x
    x = 2,369,227,019.79/71,890.91
  6. Step 6: Final answer
    x = 32,955.87

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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.