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Finding the Fourth Proportional to 66,207.79, 99,301.96 and 21,835.99

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Solution

The fourth proportional to 66,207.79, 99,301.96 and 21,835.99 is: 32,750.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,207.79 : 99,301.96 = 21,835.99 : x
  2. Step 2: Convert to fraction form
    66,207.79/99,301.96 = 21,835.99/x
  3. Step 3: Cross multiply
    66,207.79x = 99,301.96 × 21,835.99
  4. Step 4: Simplify right side
    66,207.79x = 2,168,356,605.54
  5. Step 5: Solve for x
    x = 2,168,356,605.54/66,207.79
  6. Step 6: Final answer
    x = 32,750.78

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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.