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Finding the Fourth Proportional to 105,761.68, 158,783.30 and 61,420.26

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Solution

The fourth proportional to 105,761.68, 158,783.30 and 61,420.26 is: 92,212.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,761.68 : 158,783.30 = 61,420.26 : x
  2. Step 2: Convert to fraction form
    105,761.68/158,783.30 = 61,420.26/x
  3. Step 3: Cross multiply
    105,761.68x = 158,783.30 × 61,420.26
  4. Step 4: Simplify right side
    105,761.68x = 9,752,511,569.66
  5. Step 5: Solve for x
    x = 9,752,511,569.66/105,761.68
  6. Step 6: Final answer
    x = 92,212.15

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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.