Home / 105,175.22-145,140.73-64,872.86

Finding the Fourth Proportional to 105,175.22, 145,140.73 and 64,872.86

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Solution

The fourth proportional to 105,175.22, 145,140.73 and 64,872.86 is: 89,523.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,175.22 : 145,140.73 = 64,872.86 : x
  2. Step 2: Convert to fraction form
    105,175.22/145,140.73 = 64,872.86/x
  3. Step 3: Cross multiply
    105,175.22x = 145,140.73 × 64,872.86
  4. Step 4: Simplify right side
    105,175.22x = 9,415,693,369.70
  5. Step 5: Solve for x
    x = 9,415,693,369.70/105,175.22
  6. Step 6: Final answer
    x = 89,523.88

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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.