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Finding the Fourth Proportional to 123,457.53, 170,370.50 and 66,868.50

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Solution

The fourth proportional to 123,457.53, 170,370.50 and 66,868.50 is: 92,278.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,457.53 : 170,370.50 = 66,868.50 : x
  2. Step 2: Convert to fraction form
    123,457.53/170,370.50 = 66,868.50/x
  3. Step 3: Cross multiply
    123,457.53x = 170,370.50 × 66,868.50
  4. Step 4: Simplify right side
    123,457.53x = 11,392,419,444.91
  5. Step 5: Solve for x
    x = 11,392,419,444.91/123,457.53
  6. Step 6: Final answer
    x = 92,278.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.