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Finding the Fourth Proportional to 158,642.38, 218,922.47 and 90,655.03

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Solution

The fourth proportional to 158,642.38, 218,922.47 and 90,655.03 is: 125,101.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,642.38 : 218,922.47 = 90,655.03 : x
  2. Step 2: Convert to fraction form
    158,642.38/218,922.47 = 90,655.03/x
  3. Step 3: Cross multiply
    158,642.38x = 218,922.47 × 90,655.03
  4. Step 4: Simplify right side
    158,642.38x = 19,846,421,990.91
  5. Step 5: Solve for x
    x = 19,846,421,990.91/158,642.38
  6. Step 6: Final answer
    x = 125,101.64

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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.