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Finding the Fourth Proportional to 72,928.39, 109,348.83 and 28,502.22

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Solution

The fourth proportional to 72,928.39, 109,348.83 and 28,502.22 is: 42,736.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,928.39 : 109,348.83 = 28,502.22 : x
  2. Step 2: Convert to fraction form
    72,928.39/109,348.83 = 28,502.22/x
  3. Step 3: Cross multiply
    72,928.39x = 109,348.83 × 28,502.22
  4. Step 4: Simplify right side
    72,928.39x = 3,116,684,409.40
  5. Step 5: Solve for x
    x = 3,116,684,409.40/72,928.39
  6. Step 6: Final answer
    x = 42,736.23

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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.