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Finding the Fourth Proportional to 170,987.22, 256,485.21 and 81,008.87

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Solution

The fourth proportional to 170,987.22, 256,485.21 and 81,008.87 is: 121,515.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,987.22 : 256,485.21 = 81,008.87 : x
  2. Step 2: Convert to fraction form
    170,987.22/256,485.21 = 81,008.87/x
  3. Step 3: Cross multiply
    170,987.22x = 256,485.21 × 81,008.87
  4. Step 4: Simplify right side
    170,987.22x = 20,777,575,751.39
  5. Step 5: Solve for x
    x = 20,777,575,751.39/170,987.22
  6. Step 6: Final answer
    x = 121,515.37

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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.