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Finding the Fourth Proportional to 317,761.21, 476,641.32 and 81,103.87

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Solution

The fourth proportional to 317,761.21, 476,641.32 and 81,103.87 is: 121,655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,761.21 : 476,641.32 = 81,103.87 : x
  2. Step 2: Convert to fraction form
    317,761.21/476,641.32 = 81,103.87/x
  3. Step 3: Cross multiply
    317,761.21x = 476,641.32 × 81,103.87
  4. Step 4: Simplify right side
    317,761.21x = 38,657,455,653.91
  5. Step 5: Solve for x
    x = 38,657,455,653.91/317,761.21
  6. Step 6: Final answer
    x = 121,655.68

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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.