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Finding the Fourth Proportional to 124,987.68, 172,476.36 and 68,388.12

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Solution

The fourth proportional to 124,987.68, 172,476.36 and 68,388.12 is: 94,371.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,987.68 : 172,476.36 = 68,388.12 : x
  2. Step 2: Convert to fraction form
    124,987.68/172,476.36 = 68,388.12/x
  3. Step 3: Cross multiply
    124,987.68x = 172,476.36 × 68,388.12
  4. Step 4: Simplify right side
    124,987.68x = 11,795,334,004.84
  5. Step 5: Solve for x
    x = 11,795,334,004.84/124,987.68
  6. Step 6: Final answer
    x = 94,371.97

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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.