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Finding the Fourth Proportional to 72,800.36, 109,200.54 and 20,210.28

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Solution

The fourth proportional to 72,800.36, 109,200.54 and 20,210.28 is: 30,315.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,800.36 : 109,200.54 = 20,210.28 : x
  2. Step 2: Convert to fraction form
    72,800.36/109,200.54 = 20,210.28/x
  3. Step 3: Cross multiply
    72,800.36x = 109,200.54 × 20,210.28
  4. Step 4: Simplify right side
    72,800.36x = 2,206,973,489.55
  5. Step 5: Solve for x
    x = 2,206,973,489.55/72,800.36
  6. Step 6: Final answer
    x = 30,315.42

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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.