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Finding the Fourth Proportional to 158,611.80, 218,863.98 and 90,633.10

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Solution

The fourth proportional to 158,611.80, 218,863.98 and 90,633.10 is: 125,062.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,611.80 : 218,863.98 = 90,633.10 : x
  2. Step 2: Convert to fraction form
    158,611.80/218,863.98 = 90,633.10/x
  3. Step 3: Cross multiply
    158,611.80x = 218,863.98 × 90,633.10
  4. Step 4: Simplify right side
    158,611.80x = 19,836,320,985.74
  5. Step 5: Solve for x
    x = 19,836,320,985.74/158,611.80
  6. Step 6: Final answer
    x = 125,062.08

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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.