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Finding the Fourth Proportional to 108,921.11, 150,349.77 and 65,902.82

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Solution

The fourth proportional to 108,921.11, 150,349.77 and 65,902.82 is: 90,969.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,921.11 : 150,349.77 = 65,902.82 : x
  2. Step 2: Convert to fraction form
    108,921.11/150,349.77 = 65,902.82/x
  3. Step 3: Cross multiply
    108,921.11x = 150,349.77 × 65,902.82
  4. Step 4: Simplify right side
    108,921.11x = 9,908,473,077.60
  5. Step 5: Solve for x
    x = 9,908,473,077.60/108,921.11
  6. Step 6: Final answer
    x = 90,969.27

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1.5x scale

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.