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Finding the Fourth Proportional to 159,387.33, 219,955.95 and 87,767.64

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Solution

The fourth proportional to 159,387.33, 219,955.95 and 87,767.64 is: 121,120.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,387.33 : 219,955.95 = 87,767.64 : x
  2. Step 2: Convert to fraction form
    159,387.33/219,955.95 = 87,767.64/x
  3. Step 3: Cross multiply
    159,387.33x = 219,955.95 × 87,767.64
  4. Step 4: Simplify right side
    159,387.33x = 19,305,014,635.46
  5. Step 5: Solve for x
    x = 19,305,014,635.46/159,387.33
  6. Step 6: Final answer
    x = 121,120.13

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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.