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Finding the Fourth Proportional to 171,620.60, 257,085.30 and 119,089.40

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Solution

The fourth proportional to 171,620.60, 257,085.30 and 119,089.40 is: 178,394.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,620.60 : 257,085.30 = 119,089.40 : x
  2. Step 2: Convert to fraction form
    171,620.60/257,085.30 = 119,089.40/x
  3. Step 3: Cross multiply
    171,620.60x = 257,085.30 × 119,089.40
  4. Step 4: Simplify right side
    171,620.60x = 30,616,134,125.82
  5. Step 5: Solve for x
    x = 30,616,134,125.82/171,620.60
  6. Step 6: Final answer
    x = 178,394.28

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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.