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Finding the Fourth Proportional to 115,039.80, 158,753.40 and 66,648.32

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Solution

The fourth proportional to 115,039.80, 158,753.40 and 66,648.32 is: 91,973.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,039.80 : 158,753.40 = 66,648.32 : x
  2. Step 2: Convert to fraction form
    115,039.80/158,753.40 = 66,648.32/x
  3. Step 3: Cross multiply
    115,039.80x = 158,753.40 × 66,648.32
  4. Step 4: Simplify right side
    115,039.80x = 10,580,647,964.75
  5. Step 5: Solve for x
    x = 10,580,647,964.75/115,039.80
  6. Step 6: Final answer
    x = 91,973.81

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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.