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Finding the Fourth Proportional to 171,390.40, 257,085.60 and 115,403.20

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Solution

The fourth proportional to 171,390.40, 257,085.60 and 115,403.20 is: 173,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,390.40 : 257,085.60 = 115,403.20 : x
  2. Step 2: Convert to fraction form
    171,390.40/257,085.60 = 115,403.20/x
  3. Step 3: Cross multiply
    171,390.40x = 257,085.60 × 115,403.20
  4. Step 4: Simplify right side
    171,390.40x = 29,668,500,913.92
  5. Step 5: Solve for x
    x = 29,668,500,913.92/171,390.40
  6. Step 6: Final answer
    x = 173,104.80

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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.