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Finding the Fourth Proportional to 211,069.80, 316,531.80 and 61,269.48

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Solution

The fourth proportional to 211,069.80, 316,531.80 and 61,269.48 is: 91,883.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,069.80 : 316,531.80 = 61,269.48 : x
  2. Step 2: Convert to fraction form
    211,069.80/316,531.80 = 61,269.48/x
  3. Step 3: Cross multiply
    211,069.80x = 316,531.80 × 61,269.48
  4. Step 4: Simplify right side
    211,069.80x = 19,393,738,789.46
  5. Step 5: Solve for x
    x = 19,393,738,789.46/211,069.80
  6. Step 6: Final answer
    x = 91,883.06

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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.