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Finding the Fourth Proportional to 170,728.44, 256,089.30 and 77,168.76

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Solution

The fourth proportional to 170,728.44, 256,089.30 and 77,168.76 is: 115,751.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,728.44 : 256,089.30 = 77,168.76 : x
  2. Step 2: Convert to fraction form
    170,728.44/256,089.30 = 77,168.76/x
  3. Step 3: Cross multiply
    170,728.44x = 256,089.30 × 77,168.76
  4. Step 4: Simplify right side
    170,728.44x = 19,762,093,730.27
  5. Step 5: Solve for x
    x = 19,762,093,730.27/170,728.44
  6. Step 6: Final answer
    x = 115,751.62

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1.5x scale

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.