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Finding the Fourth Proportional to 72,114.30, 108,171.45 and 19,523.70

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Solution

The fourth proportional to 72,114.30, 108,171.45 and 19,523.70 is: 29,285.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,114.30 : 108,171.45 = 19,523.70 : x
  2. Step 2: Convert to fraction form
    72,114.30/108,171.45 = 19,523.70/x
  3. Step 3: Cross multiply
    72,114.30x = 108,171.45 × 19,523.70
  4. Step 4: Simplify right side
    72,114.30x = 2,111,906,938.37
  5. Step 5: Solve for x
    x = 2,111,906,938.37/72,114.30
  6. Step 6: Final answer
    x = 29,285.55

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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.