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Finding the Fourth Proportional to 140,755.74, 211,108.38 and 69,655.50

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Solution

The fourth proportional to 140,755.74, 211,108.38 and 69,655.50 is: 104,470.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,755.74 : 211,108.38 = 69,655.50 : x
  2. Step 2: Convert to fraction form
    140,755.74/211,108.38 = 69,655.50/x
  3. Step 3: Cross multiply
    140,755.74x = 211,108.38 × 69,655.50
  4. Step 4: Simplify right side
    140,755.74x = 14,704,859,763.09
  5. Step 5: Solve for x
    x = 14,704,859,763.09/140,755.74
  6. Step 6: Final answer
    x = 104,470.76

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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.