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Finding the Fourth Proportional to 138,010.80, 207,016.20 and 122,977.20

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Solution

The fourth proportional to 138,010.80, 207,016.20 and 122,977.20 is: 184,465.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,010.80 : 207,016.20 = 122,977.20 : x
  2. Step 2: Convert to fraction form
    138,010.80/207,016.20 = 122,977.20/x
  3. Step 3: Cross multiply
    138,010.80x = 207,016.20 × 122,977.20
  4. Step 4: Simplify right side
    138,010.80x = 25,458,272,630.64
  5. Step 5: Solve for x
    x = 25,458,272,630.64/138,010.80
  6. Step 6: Final answer
    x = 184,465.80

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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.