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Finding the Fourth Proportional to 170,657.76, 255,643.92 and 85,010.64

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Solution

The fourth proportional to 170,657.76, 255,643.92 and 85,010.64 is: 127,345.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,657.76 : 255,643.92 = 85,010.64 : x
  2. Step 2: Convert to fraction form
    170,657.76/255,643.92 = 85,010.64/x
  3. Step 3: Cross multiply
    170,657.76x = 255,643.92 × 85,010.64
  4. Step 4: Simplify right side
    170,657.76x = 21,732,453,251.31
  5. Step 5: Solve for x
    x = 21,732,453,251.31/170,657.76
  6. Step 6: Final answer
    x = 127,345.24

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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.