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Finding the Fourth Proportional to 108,999.02, 150,419.64 and 65,979.50

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Solution

The fourth proportional to 108,999.02, 150,419.64 and 65,979.50 is: 91,052.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,999.02 : 150,419.64 = 65,979.50 : x
  2. Step 2: Convert to fraction form
    108,999.02/150,419.64 = 65,979.50/x
  3. Step 3: Cross multiply
    108,999.02x = 150,419.64 × 65,979.50
  4. Step 4: Simplify right side
    108,999.02x = 9,924,612,637.38
  5. Step 5: Solve for x
    x = 9,924,612,637.38/108,999.02
  6. Step 6: Final answer
    x = 91,052.31

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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.