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Finding the Fourth Proportional to 68,838.80, 103,216.65 and 30,881.15

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Solution

The fourth proportional to 68,838.80, 103,216.65 and 30,881.15 is: 46,303.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,838.80 : 103,216.65 = 30,881.15 : x
  2. Step 2: Convert to fraction form
    68,838.80/103,216.65 = 30,881.15/x
  3. Step 3: Cross multiply
    68,838.80x = 103,216.65 × 30,881.15
  4. Step 4: Simplify right side
    68,838.80x = 3,187,448,335.06
  5. Step 5: Solve for x
    x = 3,187,448,335.06/68,838.80
  6. Step 6: Final answer
    x = 46,303.08

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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.