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Finding the Fourth Proportional to 171,495.57, 257,401.25 and 87,315.90

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Solution

The fourth proportional to 171,495.57, 257,401.25 and 87,315.90 is: 131,054.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,495.57 : 257,401.25 = 87,315.90 : x
  2. Step 2: Convert to fraction form
    171,495.57/257,401.25 = 87,315.90/x
  3. Step 3: Cross multiply
    171,495.57x = 257,401.25 × 87,315.90
  4. Step 4: Simplify right side
    171,495.57x = 22,475,221,368.30
  5. Step 5: Solve for x
    x = 22,475,221,368.30/171,495.57
  6. Step 6: Final answer
    x = 131,054.24

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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.