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Finding the Fourth Proportional to 72,650.56, 108,988.80 and 28,301.44

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Solution

The fourth proportional to 72,650.56, 108,988.80 and 28,301.44 is: 42,457.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,650.56 : 108,988.80 = 28,301.44 : x
  2. Step 2: Convert to fraction form
    72,650.56/108,988.80 = 28,301.44/x
  3. Step 3: Cross multiply
    72,650.56x = 108,988.80 × 28,301.44
  4. Step 4: Simplify right side
    72,650.56x = 3,084,539,983.87
  5. Step 5: Solve for x
    x = 3,084,539,983.87/72,650.56
  6. Step 6: Final answer
    x = 42,457.21

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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.