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Finding the Fourth Proportional to 66,246, 99,344.70 and 21,859.62

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Solution

The fourth proportional to 66,246, 99,344.70 and 21,859.62 is: 32,781.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,246 : 99,344.70 = 21,859.62 : x
  2. Step 2: Convert to fraction form
    66,246/99,344.70 = 21,859.62/x
  3. Step 3: Cross multiply
    66,246x = 99,344.70 × 21,859.62
  4. Step 4: Simplify right side
    66,246x = 2,171,637,391.01
  5. Step 5: Solve for x
    x = 2,171,637,391.01/66,246
  6. Step 6: Final answer
    x = 32,781.41

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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.