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Finding the Fourth Proportional to 66,903.84, 100,372.64 and 47,220.84

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Solution

The fourth proportional to 66,903.84, 100,372.64 and 47,220.84 is: 70,843.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,903.84 : 100,372.64 = 47,220.84 : x
  2. Step 2: Convert to fraction form
    66,903.84/100,372.64 = 47,220.84/x
  3. Step 3: Cross multiply
    66,903.84x = 100,372.64 × 47,220.84
  4. Step 4: Simplify right side
    66,903.84x = 4,739,680,137.71
  5. Step 5: Solve for x
    x = 4,739,680,137.71/66,903.84
  6. Step 6: Final answer
    x = 70,843.17

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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.