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Finding the Fourth Proportional to 73,160.80, 109,741.20 and 20,579.20

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Solution

The fourth proportional to 73,160.80, 109,741.20 and 20,579.20 is: 30,868.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,160.80 : 109,741.20 = 20,579.20 : x
  2. Step 2: Convert to fraction form
    73,160.80/109,741.20 = 20,579.20/x
  3. Step 3: Cross multiply
    73,160.80x = 109,741.20 × 20,579.20
  4. Step 4: Simplify right side
    73,160.80x = 2,258,386,103.04
  5. Step 5: Solve for x
    x = 2,258,386,103.04/73,160.80
  6. Step 6: Final answer
    x = 30,868.80

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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.