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Finding the Fourth Proportional to 99,881.25, 137,836.13 and 55,172.13

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Solution

The fourth proportional to 99,881.25, 137,836.13 and 55,172.13 is: 76,137.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,881.25 : 137,836.13 = 55,172.13 : x
  2. Step 2: Convert to fraction form
    99,881.25/137,836.13 = 55,172.13/x
  3. Step 3: Cross multiply
    99,881.25x = 137,836.13 × 55,172.13
  4. Step 4: Simplify right side
    99,881.25x = 7,604,712,607.20
  5. Step 5: Solve for x
    x = 7,604,712,607.20/99,881.25
  6. Step 6: Final answer
    x = 76,137.54

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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.