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Finding the Fourth Proportional to 211,807.92, 317,773.37 and 85,382.92

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Solution

The fourth proportional to 211,807.92, 317,773.37 and 85,382.92 is: 128,099.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,807.92 : 317,773.37 = 85,382.92 : x
  2. Step 2: Convert to fraction form
    211,807.92/317,773.37 = 85,382.92/x
  3. Step 3: Cross multiply
    211,807.92x = 317,773.37 × 85,382.92
  4. Step 4: Simplify right side
    211,807.92x = 27,132,418,442.30
  5. Step 5: Solve for x
    x = 27,132,418,442.30/211,807.92
  6. Step 6: Final answer
    x = 128,099.17

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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.