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Finding the Fourth Proportional to 72,618.42, 100,259.83 and 48,453.90

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Solution

The fourth proportional to 72,618.42, 100,259.83 and 48,453.90 is: 66,897.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,618.42 : 100,259.83 = 48,453.90 : x
  2. Step 2: Convert to fraction form
    72,618.42/100,259.83 = 48,453.90/x
  3. Step 3: Cross multiply
    72,618.42x = 100,259.83 × 48,453.90
  4. Step 4: Simplify right side
    72,618.42x = 4,857,979,188.88
  5. Step 5: Solve for x
    x = 4,857,979,188.88/72,618.42
  6. Step 6: Final answer
    x = 66,897.34

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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.