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Finding the Fourth Proportional to 317,767.21, 476,667.21 and 81,111.94

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Solution

The fourth proportional to 317,767.21, 476,667.21 and 81,111.94 is: 121,672.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,767.21 : 476,667.21 = 81,111.94 : x
  2. Step 2: Convert to fraction form
    317,767.21/476,667.21 = 81,111.94/x
  3. Step 3: Cross multiply
    317,767.21x = 476,667.21 × 81,111.94
  4. Step 4: Simplify right side
    317,767.21x = 38,663,402,137.49
  5. Step 5: Solve for x
    x = 38,663,402,137.49/317,767.21
  6. Step 6: Final answer
    x = 121,672.09

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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.