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Finding the Fourth Proportional to 159,434.65, 220,021.31 and 87,814.93

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Solution

The fourth proportional to 159,434.65, 220,021.31 and 87,814.93 is: 121,185.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,434.65 : 220,021.31 = 87,814.93 : x
  2. Step 2: Convert to fraction form
    159,434.65/220,021.31 = 87,814.93/x
  3. Step 3: Cross multiply
    159,434.65x = 220,021.31 × 87,814.93
  4. Step 4: Simplify right side
    159,434.65x = 19,321,155,497.08
  5. Step 5: Solve for x
    x = 19,321,155,497.08/159,434.65
  6. Step 6: Final answer
    x = 121,185.42

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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.