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Finding the Fourth Proportional to 124,796.78, 172,361.61 and 83,889.87

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Solution

The fourth proportional to 124,796.78, 172,361.61 and 83,889.87 is: 115,863.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,796.78 : 172,361.61 = 83,889.87 : x
  2. Step 2: Convert to fraction form
    124,796.78/172,361.61 = 83,889.87/x
  3. Step 3: Cross multiply
    124,796.78x = 172,361.61 × 83,889.87
  4. Step 4: Simplify right side
    124,796.78x = 14,459,393,277.07
  5. Step 5: Solve for x
    x = 14,459,393,277.07/124,796.78
  6. Step 6: Final answer
    x = 115,863.52

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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.