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Finding the Fourth Proportional to 123,494.77, 170,420.56 and 69,778.64

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Solution

The fourth proportional to 123,494.77, 170,420.56 and 69,778.64 is: 96,293.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,494.77 : 170,420.56 = 69,778.64 : x
  2. Step 2: Convert to fraction form
    123,494.77/170,420.56 = 69,778.64/x
  3. Step 3: Cross multiply
    123,494.77x = 170,420.56 × 69,778.64
  4. Step 4: Simplify right side
    123,494.77x = 11,891,714,052.74
  5. Step 5: Solve for x
    x = 11,891,714,052.74/123,494.77
  6. Step 6: Final answer
    x = 96,293.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.