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Finding the Fourth Proportional to 141,117.89, 211,713.72 and 81,896.63

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Solution

The fourth proportional to 141,117.89, 211,713.72 and 81,896.63 is: 122,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,117.89 : 211,713.72 = 81,896.63 : x
  2. Step 2: Convert to fraction form
    141,117.89/211,713.72 = 81,896.63/x
  3. Step 3: Cross multiply
    141,117.89x = 211,713.72 × 81,896.63
  4. Step 4: Simplify right side
    141,117.89x = 17,338,640,192.76
  5. Step 5: Solve for x
    x = 17,338,640,192.76/141,117.89
  6. Step 6: Final answer
    x = 122,866.35

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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.