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Finding the Fourth Proportional to 89,891.80, 134,837.70 and 56,714.20

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Solution

The fourth proportional to 89,891.80, 134,837.70 and 56,714.20 is: 85,071.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,891.80 : 134,837.70 = 56,714.20 : x
  2. Step 2: Convert to fraction form
    89,891.80/134,837.70 = 56,714.20/x
  3. Step 3: Cross multiply
    89,891.80x = 134,837.70 × 56,714.20
  4. Step 4: Simplify right side
    89,891.80x = 7,647,212,285.34
  5. Step 5: Solve for x
    x = 7,647,212,285.34/89,891.80
  6. Step 6: Final answer
    x = 85,071.30

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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.