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Finding the Fourth Proportional to 70,691.37, 106,009.16 and 28,563.50

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Solution

The fourth proportional to 70,691.37, 106,009.16 and 28,563.50 is: 42,833.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,691.37 : 106,009.16 = 28,563.50 : x
  2. Step 2: Convert to fraction form
    70,691.37/106,009.16 = 28,563.50/x
  3. Step 3: Cross multiply
    70,691.37x = 106,009.16 × 28,563.50
  4. Step 4: Simplify right side
    70,691.37x = 3,027,992,763.87
  5. Step 5: Solve for x
    x = 3,027,992,763.87/70,691.37
  6. Step 6: Final answer
    x = 42,833.98

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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.