Home / 138,741.46-191,463.72-75,079.28

Finding the Fourth Proportional to 138,741.46, 191,463.72 and 75,079.28

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Solution

The fourth proportional to 138,741.46, 191,463.72 and 75,079.28 is: 103,609.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,741.46 : 191,463.72 = 75,079.28 : x
  2. Step 2: Convert to fraction form
    138,741.46/191,463.72 = 75,079.28/x
  3. Step 3: Cross multiply
    138,741.46x = 191,463.72 × 75,079.28
  4. Step 4: Simplify right side
    138,741.46x = 14,374,958,243.72
  5. Step 5: Solve for x
    x = 14,374,958,243.72/138,741.46
  6. Step 6: Final answer
    x = 103,609.68

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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.