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Finding the Fourth Proportional to 66,246.30, 99,223.65 and 39,905.10

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Solution

The fourth proportional to 66,246.30, 99,223.65 and 39,905.10 is: 59,769.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,246.30 : 99,223.65 = 39,905.10 : x
  2. Step 2: Convert to fraction form
    66,246.30/99,223.65 = 39,905.10/x
  3. Step 3: Cross multiply
    66,246.30x = 99,223.65 × 39,905.10
  4. Step 4: Simplify right side
    66,246.30x = 3,959,529,675.62
  5. Step 5: Solve for x
    x = 3,959,529,675.62/66,246.30
  6. Step 6: Final answer
    x = 59,769.82

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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.