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Finding the Fourth Proportional to 108,874.31, 150,246.55 and 61,128.68

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Solution

The fourth proportional to 108,874.31, 150,246.55 and 61,128.68 is: 84,357.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,874.31 : 150,246.55 = 61,128.68 : x
  2. Step 2: Convert to fraction form
    108,874.31/150,246.55 = 61,128.68/x
  3. Step 3: Cross multiply
    108,874.31x = 150,246.55 × 61,128.68
  4. Step 4: Simplify right side
    108,874.31x = 9,184,372,970.41
  5. Step 5: Solve for x
    x = 9,184,372,970.41/108,874.31
  6. Step 6: Final answer
    x = 84,357.58

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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.