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Finding the Fourth Proportional to 123,068.84, 169,835.09 and 66,480.21

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Solution

The fourth proportional to 123,068.84, 169,835.09 and 66,480.21 is: 91,742.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,068.84 : 169,835.09 = 66,480.21 : x
  2. Step 2: Convert to fraction form
    123,068.84/169,835.09 = 66,480.21/x
  3. Step 3: Cross multiply
    123,068.84x = 169,835.09 × 66,480.21
  4. Step 4: Simplify right side
    123,068.84x = 11,290,672,116.17
  5. Step 5: Solve for x
    x = 11,290,672,116.17/123,068.84
  6. Step 6: Final answer
    x = 91,742.74

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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.