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Finding the Fourth Proportional to 101,885.65, 152,629.66 and 66,718.69

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Solution

The fourth proportional to 101,885.65, 152,629.66 and 66,718.69 is: 99,947.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,885.65 : 152,629.66 = 66,718.69 : x
  2. Step 2: Convert to fraction form
    101,885.65/152,629.66 = 66,718.69/x
  3. Step 3: Cross multiply
    101,885.65x = 152,629.66 × 66,718.69
  4. Step 4: Simplify right side
    101,885.65x = 10,183,250,672.17
  5. Step 5: Solve for x
    x = 10,183,250,672.17/101,885.65
  6. Step 6: Final answer
    x = 99,947.84

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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.