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Finding the Fourth Proportional to 108,873.89, 150,242.12 and 61,129.25

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Solution

The fourth proportional to 108,873.89, 150,242.12 and 61,129.25 is: 84,356.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,873.89 : 150,242.12 = 61,129.25 : x
  2. Step 2: Convert to fraction form
    108,873.89/150,242.12 = 61,129.25/x
  3. Step 3: Cross multiply
    108,873.89x = 150,242.12 × 61,129.25
  4. Step 4: Simplify right side
    108,873.89x = 9,184,187,808.36
  5. Step 5: Solve for x
    x = 9,184,187,808.36/108,873.89
  6. Step 6: Final answer
    x = 84,356.20

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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.