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Finding the Fourth Proportional to 66,641.54, 99,912.93 and 40,340.06

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Solution

The fourth proportional to 66,641.54, 99,912.93 and 40,340.06 is: 60,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,641.54 : 99,912.93 = 40,340.06 : x
  2. Step 2: Convert to fraction form
    66,641.54/99,912.93 = 40,340.06/x
  3. Step 3: Cross multiply
    66,641.54x = 99,912.93 × 40,340.06
  4. Step 4: Simplify right side
    66,641.54x = 4,030,493,590.98
  5. Step 5: Solve for x
    x = 4,030,493,590.98/66,641.54
  6. Step 6: Final answer
    x = 60,480.20

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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.