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Finding the Fourth Proportional to 120,724.48, 166,600.88 and 73,009.72

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Solution

The fourth proportional to 120,724.48, 166,600.88 and 73,009.72 is: 100,754.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,724.48 : 166,600.88 = 73,009.72 : x
  2. Step 2: Convert to fraction form
    120,724.48/166,600.88 = 73,009.72/x
  3. Step 3: Cross multiply
    120,724.48x = 166,600.88 × 73,009.72
  4. Step 4: Simplify right side
    120,724.48x = 12,163,483,600.55
  5. Step 5: Solve for x
    x = 12,163,483,600.55/120,724.48
  6. Step 6: Final answer
    x = 100,754.08

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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.