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Finding the Fourth Proportional to 123,390.63, 170,279.89 and 66,802.01

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Solution

The fourth proportional to 123,390.63, 170,279.89 and 66,802.01 is: 92,187.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,390.63 : 170,279.89 = 66,802.01 : x
  2. Step 2: Convert to fraction form
    123,390.63/170,279.89 = 66,802.01/x
  3. Step 3: Cross multiply
    123,390.63x = 170,279.89 × 66,802.01
  4. Step 4: Simplify right side
    123,390.63x = 11,375,037,896.17
  5. Step 5: Solve for x
    x = 11,375,037,896.17/123,390.63
  6. Step 6: Final answer
    x = 92,187.21

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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.