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Finding the Fourth Proportional to 158,987.58, 219,405.42 and 91,004.28

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Solution

The fourth proportional to 158,987.58, 219,405.42 and 91,004.28 is: 125,587.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,987.58 : 219,405.42 = 91,004.28 : x
  2. Step 2: Convert to fraction form
    158,987.58/219,405.42 = 91,004.28/x
  3. Step 3: Cross multiply
    158,987.58x = 219,405.42 × 91,004.28
  4. Step 4: Simplify right side
    158,987.58x = 19,966,832,275.20
  5. Step 5: Solve for x
    x = 19,966,832,275.20/158,987.58
  6. Step 6: Final answer
    x = 125,587.37

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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.