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Finding the Fourth Proportional to 99,395.11, 136,976.29 and 71,051.59

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Solution

The fourth proportional to 99,395.11, 136,976.29 and 71,051.59 is: 97,916.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,395.11 : 136,976.29 = 71,051.59 : x
  2. Step 2: Convert to fraction form
    99,395.11/136,976.29 = 71,051.59/x
  3. Step 3: Cross multiply
    99,395.11x = 136,976.29 × 71,051.59
  4. Step 4: Simplify right side
    99,395.11x = 9,732,383,196.80
  5. Step 5: Solve for x
    x = 9,732,383,196.80/99,395.11
  6. Step 6: Final answer
    x = 97,916.12

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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.