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Finding the Fourth Proportional to 66,612.64, 99,433 and 58,205

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Solution

The fourth proportional to 66,612.64, 99,433 and 58,205 is: 86,882.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,612.64 : 99,433 = 58,205 : x
  2. Step 2: Convert to fraction form
    66,612.64/99,433 = 58,205/x
  3. Step 3: Cross multiply
    66,612.64x = 99,433 × 58,205
  4. Step 4: Simplify right side
    66,612.64x = 5,787,497,765
  5. Step 5: Solve for x
    x = 5,787,497,765/66,612.64
  6. Step 6: Final answer
    x = 86,882.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.