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Finding the Fourth Proportional to 73,092.80, 109,639.20 and 70,905.80

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Solution

The fourth proportional to 73,092.80, 109,639.20 and 70,905.80 is: 106,358.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,092.80 : 109,639.20 = 70,905.80 : x
  2. Step 2: Convert to fraction form
    73,092.80/109,639.20 = 70,905.80/x
  3. Step 3: Cross multiply
    73,092.80x = 109,639.20 × 70,905.80
  4. Step 4: Simplify right side
    73,092.80x = 7,774,055,187.36
  5. Step 5: Solve for x
    x = 7,774,055,187.36/73,092.80
  6. Step 6: Final answer
    x = 106,358.70

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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.