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Finding the Fourth Proportional to 158,657.96, 218,934.04 and 90,661.44

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Solution

The fourth proportional to 158,657.96, 218,934.04 and 90,661.44 is: 125,104.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,657.96 : 218,934.04 = 90,661.44 : x
  2. Step 2: Convert to fraction form
    158,657.96/218,934.04 = 90,661.44/x
  3. Step 3: Cross multiply
    158,657.96x = 218,934.04 × 90,661.44
  4. Step 4: Simplify right side
    158,657.96x = 19,848,875,331.42
  5. Step 5: Solve for x
    x = 19,848,875,331.42/158,657.96
  6. Step 6: Final answer
    x = 125,104.82

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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.