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Finding the Fourth Proportional to 76,649.17, 105,775.77 and 43,115.17

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Solution

The fourth proportional to 76,649.17, 105,775.77 and 43,115.17 is: 59,498.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,649.17 : 105,775.77 = 43,115.17 : x
  2. Step 2: Convert to fraction form
    76,649.17/105,775.77 = 43,115.17/x
  3. Step 3: Cross multiply
    76,649.17x = 105,775.77 × 43,115.17
  4. Step 4: Simplify right side
    76,649.17x = 4,560,540,305.43
  5. Step 5: Solve for x
    x = 4,560,540,305.43/76,649.17
  6. Step 6: Final answer
    x = 59,498.89

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1.5x scale

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.