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Finding the Fourth Proportional to 72,956.20, 109,434.30 and 20,365.60

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Solution

The fourth proportional to 72,956.20, 109,434.30 and 20,365.60 is: 30,548.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,956.20 : 109,434.30 = 20,365.60 : x
  2. Step 2: Convert to fraction form
    72,956.20/109,434.30 = 20,365.60/x
  3. Step 3: Cross multiply
    72,956.20x = 109,434.30 × 20,365.60
  4. Step 4: Simplify right side
    72,956.20x = 2,228,695,180.08
  5. Step 5: Solve for x
    x = 2,228,695,180.08/72,956.20
  6. Step 6: Final answer
    x = 30,548.40

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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.