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Finding the Fourth Proportional to 68,721.95, 103,551.11 and 56,515.43

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Solution

The fourth proportional to 68,721.95, 103,551.11 and 56,515.43 is: 85,158.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,721.95 : 103,551.11 = 56,515.43 : x
  2. Step 2: Convert to fraction form
    68,721.95/103,551.11 = 56,515.43/x
  3. Step 3: Cross multiply
    68,721.95x = 103,551.11 × 56,515.43
  4. Step 4: Simplify right side
    68,721.95x = 5,852,235,508.63
  5. Step 5: Solve for x
    x = 5,852,235,508.63/68,721.95
  6. Step 6: Final answer
    x = 85,158.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.