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Finding the Fourth Proportional to 123,415.62, 170,314.78 and 66,828.22

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Solution

The fourth proportional to 123,415.62, 170,314.78 and 66,828.22 is: 92,223.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,415.62 : 170,314.78 = 66,828.22 : x
  2. Step 2: Convert to fraction form
    123,415.62/170,314.78 = 66,828.22/x
  3. Step 3: Cross multiply
    123,415.62x = 170,314.78 × 66,828.22
  4. Step 4: Simplify right side
    123,415.62x = 11,381,833,587.09
  5. Step 5: Solve for x
    x = 11,381,833,587.09/123,415.62
  6. Step 6: Final answer
    x = 92,223.61

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1.5x scale

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.