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Finding the Fourth Proportional to 103,663.56, 155,492.46 and 72,519.24

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Solution

The fourth proportional to 103,663.56, 155,492.46 and 72,519.24 is: 108,776.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,663.56 : 155,492.46 = 72,519.24 : x
  2. Step 2: Convert to fraction form
    103,663.56/155,492.46 = 72,519.24/x
  3. Step 3: Cross multiply
    103,663.56x = 155,492.46 × 72,519.24
  4. Step 4: Simplify right side
    103,663.56x = 11,276,195,024.93
  5. Step 5: Solve for x
    x = 11,276,195,024.93/103,663.56
  6. Step 6: Final answer
    x = 108,776.85

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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.