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Finding the Fourth Proportional to 101,920.22, 140,651.18 and 56,601.02

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Solution

The fourth proportional to 101,920.22, 140,651.18 and 56,601.02 is: 78,110.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,920.22 : 140,651.18 = 56,601.02 : x
  2. Step 2: Convert to fraction form
    101,920.22/140,651.18 = 56,601.02/x
  3. Step 3: Cross multiply
    101,920.22x = 140,651.18 × 56,601.02
  4. Step 4: Simplify right side
    101,920.22x = 7,961,000,252.20
  5. Step 5: Solve for x
    x = 7,961,000,252.20/101,920.22
  6. Step 6: Final answer
    x = 78,110.12

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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.