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Finding the Fourth Proportional to 159,434.28, 220,029.28 and 87,814.29

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Solution

The fourth proportional to 159,434.28, 220,029.28 and 87,814.29 is: 121,189.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,434.28 : 220,029.28 = 87,814.29 : x
  2. Step 2: Convert to fraction form
    159,434.28/220,029.28 = 87,814.29/x
  3. Step 3: Cross multiply
    159,434.28x = 220,029.28 × 87,814.29
  4. Step 4: Simplify right side
    159,434.28x = 19,321,713,902.26
  5. Step 5: Solve for x
    x = 19,321,713,902.26/159,434.28
  6. Step 6: Final answer
    x = 121,189.21

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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.