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Finding the Fourth Proportional to 157,249.28, 216,996.60 and 85,629.08

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Solution

The fourth proportional to 157,249.28, 216,996.60 and 85,629.08 is: 118,164.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,249.28 : 216,996.60 = 85,629.08 : x
  2. Step 2: Convert to fraction form
    157,249.28/216,996.60 = 85,629.08/x
  3. Step 3: Cross multiply
    157,249.28x = 216,996.60 × 85,629.08
  4. Step 4: Simplify right side
    157,249.28x = 18,581,219,221.13
  5. Step 5: Solve for x
    x = 18,581,219,221.13/157,249.28
  6. Step 6: Final answer
    x = 118,164.10

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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.