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Finding the Fourth Proportional to 99,108.56, 136,883.37 and 65,268.28

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Solution

The fourth proportional to 99,108.56, 136,883.37 and 65,268.28 is: 90,145.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,108.56 : 136,883.37 = 65,268.28 : x
  2. Step 2: Convert to fraction form
    99,108.56/136,883.37 = 65,268.28/x
  3. Step 3: Cross multiply
    99,108.56x = 136,883.37 × 65,268.28
  4. Step 4: Simplify right side
    99,108.56x = 8,934,142,169.23
  5. Step 5: Solve for x
    x = 8,934,142,169.23/99,108.56
  6. Step 6: Final answer
    x = 90,145.01

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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.