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Finding the Fourth Proportional to 73,173.06, 100,976.76 and 42,957.90

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Solution

The fourth proportional to 73,173.06, 100,976.76 and 42,957.90 is: 59,280.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,173.06 : 100,976.76 = 42,957.90 : x
  2. Step 2: Convert to fraction form
    73,173.06/100,976.76 = 42,957.90/x
  3. Step 3: Cross multiply
    73,173.06x = 100,976.76 × 42,957.90
  4. Step 4: Simplify right side
    73,173.06x = 4,337,749,558.40
  5. Step 5: Solve for x
    x = 4,337,749,558.40/73,173.06
  6. Step 6: Final answer
    x = 59,280.69

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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.