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Finding the Fourth Proportional to 101,955.72, 140,694.12 and 56,636.58

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Solution

The fourth proportional to 101,955.72, 140,694.12 and 56,636.58 is: 78,155.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,955.72 : 140,694.12 = 56,636.58 : x
  2. Step 2: Convert to fraction form
    101,955.72/140,694.12 = 56,636.58/x
  3. Step 3: Cross multiply
    101,955.72x = 140,694.12 × 56,636.58
  4. Step 4: Simplify right side
    101,955.72x = 7,968,433,782.91
  5. Step 5: Solve for x
    x = 7,968,433,782.91/101,955.72
  6. Step 6: Final answer
    x = 78,155.83

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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.