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Finding the Fourth Proportional to 73,128.88, 109,693.32 and 25,732.81

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Solution

The fourth proportional to 73,128.88, 109,693.32 and 25,732.81 is: 38,599.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,128.88 : 109,693.32 = 25,732.81 : x
  2. Step 2: Convert to fraction form
    73,128.88/109,693.32 = 25,732.81/x
  3. Step 3: Cross multiply
    73,128.88x = 109,693.32 × 25,732.81
  4. Step 4: Simplify right side
    73,128.88x = 2,822,717,361.83
  5. Step 5: Solve for x
    x = 2,822,717,361.83/73,128.88
  6. Step 6: Final answer
    x = 38,599.22

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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.