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Finding the Fourth Proportional to 72,559.43, 108,811.13 and 28,180.19

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Solution

The fourth proportional to 72,559.43, 108,811.13 and 28,180.19 is: 42,259.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,559.43 : 108,811.13 = 28,180.19 : x
  2. Step 2: Convert to fraction form
    72,559.43/108,811.13 = 28,180.19/x
  3. Step 3: Cross multiply
    72,559.43x = 108,811.13 × 28,180.19
  4. Step 4: Simplify right side
    72,559.43x = 3,066,318,317.51
  5. Step 5: Solve for x
    x = 3,066,318,317.51/72,559.43
  6. Step 6: Final answer
    x = 42,259.40

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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.