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Finding the Fourth Proportional to 66,787.64, 100,143.93 and 45,751.40

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Solution

The fourth proportional to 66,787.64, 100,143.93 and 45,751.40 is: 68,601.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,787.64 : 100,143.93 = 45,751.40 : x
  2. Step 2: Convert to fraction form
    66,787.64/100,143.93 = 45,751.40/x
  3. Step 3: Cross multiply
    66,787.64x = 100,143.93 × 45,751.40
  4. Step 4: Simplify right side
    66,787.64x = 4,581,724,999.00
  5. Step 5: Solve for x
    x = 4,581,724,999.00/66,787.64
  6. Step 6: Final answer
    x = 68,601.39

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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.