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Finding the Fourth Proportional to 123,088.51, 169,862.88 and 68,644.12

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Solution

The fourth proportional to 123,088.51, 169,862.88 and 68,644.12 is: 94,729.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,088.51 : 169,862.88 = 68,644.12 : x
  2. Step 2: Convert to fraction form
    123,088.51/169,862.88 = 68,644.12/x
  3. Step 3: Cross multiply
    123,088.51x = 169,862.88 × 68,644.12
  4. Step 4: Simplify right side
    123,088.51x = 11,660,087,068.95
  5. Step 5: Solve for x
    x = 11,660,087,068.95/123,088.51
  6. Step 6: Final answer
    x = 94,729.29

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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.