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Finding the Fourth Proportional to 158,643.75, 218,924.37 and 90,656.40

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Solution

The fourth proportional to 158,643.75, 218,924.37 and 90,656.40 is: 125,103.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,643.75 : 218,924.37 = 90,656.40 : x
  2. Step 2: Convert to fraction form
    158,643.75/218,924.37 = 90,656.40/x
  3. Step 3: Cross multiply
    158,643.75x = 218,924.37 × 90,656.40
  4. Step 4: Simplify right side
    158,643.75x = 19,846,895,256.47
  5. Step 5: Solve for x
    x = 19,846,895,256.47/158,643.75
  6. Step 6: Final answer
    x = 125,103.54

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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.