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Finding the Fourth Proportional to 159,434.90, 220,021.65 and 87,815.18

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Solution

The fourth proportional to 159,434.90, 220,021.65 and 87,815.18 is: 121,185.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,434.90 : 220,021.65 = 87,815.18 : x
  2. Step 2: Convert to fraction form
    159,434.90/220,021.65 = 87,815.18/x
  3. Step 3: Cross multiply
    159,434.90x = 220,021.65 × 87,815.18
  4. Step 4: Simplify right side
    159,434.90x = 19,321,240,798.65
  5. Step 5: Solve for x
    x = 19,321,240,798.65/159,434.90
  6. Step 6: Final answer
    x = 121,185.77

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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.