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Finding the Fourth Proportional to 158,758.98, 219,107.61 and 91,690.98

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Solution

The fourth proportional to 158,758.98, 219,107.61 and 91,690.98 is: 126,545.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,758.98 : 219,107.61 = 91,690.98 : x
  2. Step 2: Convert to fraction form
    158,758.98/219,107.61 = 91,690.98/x
  3. Step 3: Cross multiply
    158,758.98x = 219,107.61 × 91,690.98
  4. Step 4: Simplify right side
    158,758.98x = 20,090,191,486.36
  5. Step 5: Solve for x
    x = 20,090,191,486.36/158,758.98
  6. Step 6: Final answer
    x = 126,545.23

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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.