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Finding the Fourth Proportional to 66,207.60, 99,313.80 and 19,465.20

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Solution

The fourth proportional to 66,207.60, 99,313.80 and 19,465.20 is: 29,198.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,207.60 : 99,313.80 = 19,465.20 : x
  2. Step 2: Convert to fraction form
    66,207.60/99,313.80 = 19,465.20/x
  3. Step 3: Cross multiply
    66,207.60x = 99,313.80 × 19,465.20
  4. Step 4: Simplify right side
    66,207.60x = 1,933,162,979.76
  5. Step 5: Solve for x
    x = 1,933,162,979.76/66,207.60
  6. Step 6: Final answer
    x = 29,198.51

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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.