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Finding the Fourth Proportional to 171,492.10, 257,130.15 and 71,721.70

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Solution

The fourth proportional to 171,492.10, 257,130.15 and 71,721.70 is: 107,537.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,492.10 : 257,130.15 = 71,721.70 : x
  2. Step 2: Convert to fraction form
    171,492.10/257,130.15 = 71,721.70/x
  3. Step 3: Cross multiply
    171,492.10x = 257,130.15 × 71,721.70
  4. Step 4: Simplify right side
    171,492.10x = 18,441,811,479.26
  5. Step 5: Solve for x
    x = 18,441,811,479.26/171,492.10
  6. Step 6: Final answer
    x = 107,537.38

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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.