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Finding the Fourth Proportional to 143,789.61, 215,603.58 and 98,863.77

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Solution

The fourth proportional to 143,789.61, 215,603.58 and 98,863.77 is: 148,240.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,789.61 : 215,603.58 = 98,863.77 : x
  2. Step 2: Convert to fraction form
    143,789.61/215,603.58 = 98,863.77/x
  3. Step 3: Cross multiply
    143,789.61x = 215,603.58 × 98,863.77
  4. Step 4: Simplify right side
    143,789.61x = 21,315,382,744.30
  5. Step 5: Solve for x
    x = 21,315,382,744.30/143,789.61
  6. Step 6: Final answer
    x = 148,240.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.