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Finding the Fourth Proportional to 72,656.71, 108,987.12 and 20,066.20

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Solution

The fourth proportional to 72,656.71, 108,987.12 and 20,066.20 is: 30,099.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,656.71 : 108,987.12 = 20,066.20 : x
  2. Step 2: Convert to fraction form
    72,656.71/108,987.12 = 20,066.20/x
  3. Step 3: Cross multiply
    72,656.71x = 108,987.12 × 20,066.20
  4. Step 4: Simplify right side
    72,656.71x = 2,186,957,247.01
  5. Step 5: Solve for x
    x = 2,186,957,247.01/72,656.71
  6. Step 6: Final answer
    x = 30,099.87

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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.