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Finding the Fourth Proportional to 86,680.53, 129,787.11 and 56,620.32

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Solution

The fourth proportional to 86,680.53, 129,787.11 and 56,620.32 is: 84,777.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,680.53 : 129,787.11 = 56,620.32 : x
  2. Step 2: Convert to fraction form
    86,680.53/129,787.11 = 56,620.32/x
  3. Step 3: Cross multiply
    86,680.53x = 129,787.11 × 56,620.32
  4. Step 4: Simplify right side
    86,680.53x = 7,348,587,213.37
  5. Step 5: Solve for x
    x = 7,348,587,213.37/86,680.53
  6. Step 6: Final answer
    x = 84,777.83

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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.