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Finding the Fourth Proportional to 158,907.63, 219,293.55 and 87,287.03

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Solution

The fourth proportional to 158,907.63, 219,293.55 and 87,287.03 is: 120,456.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,907.63 : 219,293.55 = 87,287.03 : x
  2. Step 2: Convert to fraction form
    158,907.63/219,293.55 = 87,287.03/x
  3. Step 3: Cross multiply
    158,907.63x = 219,293.55 × 87,287.03
  4. Step 4: Simplify right side
    158,907.63x = 19,141,481,581.19
  5. Step 5: Solve for x
    x = 19,141,481,581.19/158,907.63
  6. Step 6: Final answer
    x = 120,456.66

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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.