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Finding the Fourth Proportional to 317,775.27, 476,662.75 and 81,117.87

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Solution

The fourth proportional to 317,775.27, 476,662.75 and 81,117.87 is: 121,676.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,775.27 : 476,662.75 = 81,117.87 : x
  2. Step 2: Convert to fraction form
    317,775.27/476,662.75 = 81,117.87/x
  3. Step 3: Cross multiply
    317,775.27x = 476,662.75 × 81,117.87
  4. Step 4: Simplify right side
    317,775.27x = 38,665,866,988.34
  5. Step 5: Solve for x
    x = 38,665,866,988.34/317,775.27
  6. Step 6: Final answer
    x = 121,676.77

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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.