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Finding the Fourth Proportional to 147,538.80, 221,016.60 and 80,859.60

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Solution

The fourth proportional to 147,538.80, 221,016.60 and 80,859.60 is: 121,129.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,538.80 : 221,016.60 = 80,859.60 : x
  2. Step 2: Convert to fraction form
    147,538.80/221,016.60 = 80,859.60/x
  3. Step 3: Cross multiply
    147,538.80x = 221,016.60 × 80,859.60
  4. Step 4: Simplify right side
    147,538.80x = 17,871,313,869.36
  5. Step 5: Solve for x
    x = 17,871,313,869.36/147,538.80
  6. Step 6: Final answer
    x = 121,129.59

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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.