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Finding the Fourth Proportional to 103,662.56, 155,490.96 and 72,518.24

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Solution

The fourth proportional to 103,662.56, 155,490.96 and 72,518.24 is: 108,775.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,662.56 : 155,490.96 = 72,518.24 : x
  2. Step 2: Convert to fraction form
    103,662.56/155,490.96 = 72,518.24/x
  3. Step 3: Cross multiply
    103,662.56x = 155,490.96 × 72,518.24
  4. Step 4: Simplify right side
    103,662.56x = 11,275,930,755.11
  5. Step 5: Solve for x
    x = 11,275,930,755.11/103,662.56
  6. Step 6: Final answer
    x = 108,775.35

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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.