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Finding the Fourth Proportional to 68,710.51, 103,063.07 and 28,719.17

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Solution

The fourth proportional to 68,710.51, 103,063.07 and 28,719.17 is: 43,077.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,710.51 : 103,063.07 = 28,719.17 : x
  2. Step 2: Convert to fraction form
    68,710.51/103,063.07 = 28,719.17/x
  3. Step 3: Cross multiply
    68,710.51x = 103,063.07 × 28,719.17
  4. Step 4: Simplify right side
    68,710.51x = 2,959,885,169.14
  5. Step 5: Solve for x
    x = 2,959,885,169.14/68,710.51
  6. Step 6: Final answer
    x = 43,077.62

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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.