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Finding the Fourth Proportional to 108,873.50, 150,241.55 and 61,128.86

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Solution

The fourth proportional to 108,873.50, 150,241.55 and 61,128.86 is: 84,355.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,873.50 : 150,241.55 = 61,128.86 : x
  2. Step 2: Convert to fraction form
    108,873.50/150,241.55 = 61,128.86/x
  3. Step 3: Cross multiply
    108,873.50x = 150,241.55 × 61,128.86
  4. Step 4: Simplify right side
    108,873.50x = 9,184,093,963.13
  5. Step 5: Solve for x
    x = 9,184,093,963.13/108,873.50
  6. Step 6: Final answer
    x = 84,355.65

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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.