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Finding the Fourth Proportional to 101,374.31, 139,893.05 and 55,435.07

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Solution

The fourth proportional to 101,374.31, 139,893.05 and 55,435.07 is: 76,498.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,374.31 : 139,893.05 = 55,435.07 : x
  2. Step 2: Convert to fraction form
    101,374.31/139,893.05 = 55,435.07/x
  3. Step 3: Cross multiply
    101,374.31x = 139,893.05 × 55,435.07
  4. Step 4: Simplify right side
    101,374.31x = 7,754,981,019.26
  5. Step 5: Solve for x
    x = 7,754,981,019.26/101,374.31
  6. Step 6: Final answer
    x = 76,498.48

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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.