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Finding the Fourth Proportional to 159,286.65, 238,819.25 and 70,491.72

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Solution

The fourth proportional to 159,286.65, 238,819.25 and 70,491.72 is: 105,688.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,286.65 : 238,819.25 = 70,491.72 : x
  2. Step 2: Convert to fraction form
    159,286.65/238,819.25 = 70,491.72/x
  3. Step 3: Cross multiply
    159,286.65x = 238,819.25 × 70,491.72
  4. Step 4: Simplify right side
    159,286.65x = 16,834,779,701.61
  5. Step 5: Solve for x
    x = 16,834,779,701.61/159,286.65
  6. Step 6: Final answer
    x = 105,688.58

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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.