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Finding the Fourth Proportional to 109,561.71, 151,193.99 and 61,815.25

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Solution

The fourth proportional to 109,561.71, 151,193.99 and 61,815.25 is: 85,304.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,561.71 : 151,193.99 = 61,815.25 : x
  2. Step 2: Convert to fraction form
    109,561.71/151,193.99 = 61,815.25/x
  3. Step 3: Cross multiply
    109,561.71x = 151,193.99 × 61,815.25
  4. Step 4: Simplify right side
    109,561.71x = 9,346,094,633.88
  5. Step 5: Solve for x
    x = 9,346,094,633.88/109,561.71
  6. Step 6: Final answer
    x = 85,304.39

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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.