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Finding the Fourth Proportional to 123,051.36, 169,810.98 and 66,462.78

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Solution

The fourth proportional to 123,051.36, 169,810.98 and 66,462.78 is: 91,718.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,051.36 : 169,810.98 = 66,462.78 : x
  2. Step 2: Convert to fraction form
    123,051.36/169,810.98 = 66,462.78/x
  3. Step 3: Cross multiply
    123,051.36x = 169,810.98 × 66,462.78
  4. Step 4: Simplify right side
    123,051.36x = 11,286,109,805.32
  5. Step 5: Solve for x
    x = 11,286,109,805.32/123,051.36
  6. Step 6: Final answer
    x = 91,718.69

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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.