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Finding the Fourth Proportional to 85,796.35, 128,694.88 and 47,869.01

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Solution

The fourth proportional to 85,796.35, 128,694.88 and 47,869.01 is: 71,803.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,796.35 : 128,694.88 = 47,869.01 : x
  2. Step 2: Convert to fraction form
    85,796.35/128,694.88 = 47,869.01/x
  3. Step 3: Cross multiply
    85,796.35x = 128,694.88 × 47,869.01
  4. Step 4: Simplify right side
    85,796.35x = 6,160,496,127.37
  5. Step 5: Solve for x
    x = 6,160,496,127.37/85,796.35
  6. Step 6: Final answer
    x = 71,803.71

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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.