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Finding the Fourth Proportional to 85,691.58, 128,574.08 and 33,137.97

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Solution

The fourth proportional to 85,691.58, 128,574.08 and 33,137.97 is: 49,721.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,691.58 : 128,574.08 = 33,137.97 : x
  2. Step 2: Convert to fraction form
    85,691.58/128,574.08 = 33,137.97/x
  3. Step 3: Cross multiply
    85,691.58x = 128,574.08 × 33,137.97
  4. Step 4: Simplify right side
    85,691.58x = 4,260,684,005.82
  5. Step 5: Solve for x
    x = 4,260,684,005.82/85,691.58
  6. Step 6: Final answer
    x = 49,721.15

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1.5x scale

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.