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Finding the Fourth Proportional to 171,479.90, 257,307.71 and 81,624.31

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Solution

The fourth proportional to 171,479.90, 257,307.71 and 81,624.31 is: 122,478.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,479.90 : 257,307.71 = 81,624.31 : x
  2. Step 2: Convert to fraction form
    171,479.90/257,307.71 = 81,624.31/x
  3. Step 3: Cross multiply
    171,479.90x = 257,307.71 × 81,624.31
  4. Step 4: Simplify right side
    171,479.90x = 21,002,563,235.04
  5. Step 5: Solve for x
    x = 21,002,563,235.04/171,479.90
  6. Step 6: Final answer
    x = 122,478.28

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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.