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Finding the Fourth Proportional to 171,128.48, 256,631.28 and 65,894.56

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Solution

The fourth proportional to 171,128.48, 256,631.28 and 65,894.56 is: 98,818.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,128.48 : 256,631.28 = 65,894.56 : x
  2. Step 2: Convert to fraction form
    171,128.48/256,631.28 = 65,894.56/x
  3. Step 3: Cross multiply
    171,128.48x = 256,631.28 × 65,894.56
  4. Step 4: Simplify right side
    171,128.48x = 16,910,605,277.84
  5. Step 5: Solve for x
    x = 16,910,605,277.84/171,128.48
  6. Step 6: Final answer
    x = 98,818.18

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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.