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Finding the Fourth Proportional to 66,488.80, 99,645.72 and 33,246.40

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Solution

The fourth proportional to 66,488.80, 99,645.72 and 33,246.40 is: 49,825.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.80 : 99,645.72 = 33,246.40 : x
  2. Step 2: Convert to fraction form
    66,488.80/99,645.72 = 33,246.40/x
  3. Step 3: Cross multiply
    66,488.80x = 99,645.72 × 33,246.40
  4. Step 4: Simplify right side
    66,488.80x = 3,312,861,465.41
  5. Step 5: Solve for x
    x = 3,312,861,465.41/66,488.80
  6. Step 6: Final answer
    x = 49,825.86

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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.