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Finding the Fourth Proportional to 91,881.84, 137,921.18 and 72,297.26

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Solution

The fourth proportional to 91,881.84, 137,921.18 and 72,297.26 is: 108,523.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,881.84 : 137,921.18 = 72,297.26 : x
  2. Step 2: Convert to fraction form
    91,881.84/137,921.18 = 72,297.26/x
  3. Step 3: Cross multiply
    91,881.84x = 137,921.18 × 72,297.26
  4. Step 4: Simplify right side
    91,881.84x = 9,971,322,358.87
  5. Step 5: Solve for x
    x = 9,971,322,358.87/91,881.84
  6. Step 6: Final answer
    x = 108,523.32

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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.