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Finding the Fourth Proportional to 72,499.44, 108,792.90 and 28,130.88

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Solution

The fourth proportional to 72,499.44, 108,792.90 and 28,130.88 is: 42,213.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,499.44 : 108,792.90 = 28,130.88 : x
  2. Step 2: Convert to fraction form
    72,499.44/108,792.90 = 28,130.88/x
  3. Step 3: Cross multiply
    72,499.44x = 108,792.90 × 28,130.88
  4. Step 4: Simplify right side
    72,499.44x = 3,060,440,014.75
  5. Step 5: Solve for x
    x = 3,060,440,014.75/72,499.44
  6. Step 6: Final answer
    x = 42,213.29

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1.5x scale

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.