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Finding the Fourth Proportional to 79,869.60, 119,285.64 and 75,100.32

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Solution

The fourth proportional to 79,869.60, 119,285.64 and 75,100.32 is: 112,162.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,869.60 : 119,285.64 = 75,100.32 : x
  2. Step 2: Convert to fraction form
    79,869.60/119,285.64 = 75,100.32/x
  3. Step 3: Cross multiply
    79,869.60x = 119,285.64 × 75,100.32
  4. Step 4: Simplify right side
    79,869.60x = 8,958,389,735.40
  5. Step 5: Solve for x
    x = 8,958,389,735.40/79,869.60
  6. Step 6: Final answer
    x = 112,162.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.