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Finding the Fourth Proportional to 72,110.79, 108,168.21 and 19,520.19

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Solution

The fourth proportional to 72,110.79, 108,168.21 and 19,520.19 is: 29,280.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,110.79 : 108,168.21 = 19,520.19 : x
  2. Step 2: Convert to fraction form
    72,110.79/108,168.21 = 19,520.19/x
  3. Step 3: Cross multiply
    72,110.79x = 108,168.21 × 19,520.19
  4. Step 4: Simplify right side
    72,110.79x = 2,111,464,011.16
  5. Step 5: Solve for x
    x = 2,111,464,011.16/72,110.79
  6. Step 6: Final answer
    x = 29,280.83

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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.