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Finding the Fourth Proportional to 108,858.57, 150,232.21 and 81,958.47

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Solution

The fourth proportional to 108,858.57, 150,232.21 and 81,958.47 is: 113,108.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,858.57 : 150,232.21 = 81,958.47 : x
  2. Step 2: Convert to fraction form
    108,858.57/150,232.21 = 81,958.47/x
  3. Step 3: Cross multiply
    108,858.57x = 150,232.21 × 81,958.47
  4. Step 4: Simplify right side
    108,858.57x = 12,312,802,614.12
  5. Step 5: Solve for x
    x = 12,312,802,614.12/108,858.57
  6. Step 6: Final answer
    x = 113,108.25

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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.