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Finding the Fourth Proportional to 68,695.52, 103,058.06 and 21,309.66

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Solution

The fourth proportional to 68,695.52, 103,058.06 and 21,309.66 is: 31,969.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,695.52 : 103,058.06 = 21,309.66 : x
  2. Step 2: Convert to fraction form
    68,695.52/103,058.06 = 21,309.66/x
  3. Step 3: Cross multiply
    68,695.52x = 103,058.06 × 21,309.66
  4. Step 4: Simplify right side
    68,695.52x = 2,196,132,112.31
  5. Step 5: Solve for x
    x = 2,196,132,112.31/68,695.52
  6. Step 6: Final answer
    x = 31,969.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.