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Finding the Fourth Proportional to 72,230.40, 99,705.60 and 43,934.40

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Solution

The fourth proportional to 72,230.40, 99,705.60 and 43,934.40 is: 60,646.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,230.40 : 99,705.60 = 43,934.40 : x
  2. Step 2: Convert to fraction form
    72,230.40/99,705.60 = 43,934.40/x
  3. Step 3: Cross multiply
    72,230.40x = 99,705.60 × 43,934.40
  4. Step 4: Simplify right side
    72,230.40x = 4,380,505,712.64
  5. Step 5: Solve for x
    x = 4,380,505,712.64/72,230.40
  6. Step 6: Final answer
    x = 60,646.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.