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Finding the Fourth Proportional to 73,313.40, 109,959.30 and 20,728.20

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Solution

The fourth proportional to 73,313.40, 109,959.30 and 20,728.20 is: 31,089.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,313.40 : 109,959.30 = 20,728.20 : x
  2. Step 2: Convert to fraction form
    73,313.40/109,959.30 = 20,728.20/x
  3. Step 3: Cross multiply
    73,313.40x = 109,959.30 × 20,728.20
  4. Step 4: Simplify right side
    73,313.40x = 2,279,258,362.26
  5. Step 5: Solve for x
    x = 2,279,258,362.26/73,313.40
  6. Step 6: Final answer
    x = 31,089.25

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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.