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Finding the Fourth Proportional to 170,721.30, 256,276.35 and 100,640.10

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Solution

The fourth proportional to 170,721.30, 256,276.35 and 100,640.10 is: 151,074.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,721.30 : 256,276.35 = 100,640.10 : x
  2. Step 2: Convert to fraction form
    170,721.30/256,276.35 = 100,640.10/x
  3. Step 3: Cross multiply
    170,721.30x = 256,276.35 × 100,640.10
  4. Step 4: Simplify right side
    170,721.30x = 25,791,677,491.64
  5. Step 5: Solve for x
    x = 25,791,677,491.64/170,721.30
  6. Step 6: Final answer
    x = 151,074.75

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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.