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Finding the Fourth Proportional to 66,308.31, 99,478.26 and 19,561.23

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Solution

The fourth proportional to 66,308.31, 99,478.26 and 19,561.23 is: 29,346.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,308.31 : 99,478.26 = 19,561.23 : x
  2. Step 2: Convert to fraction form
    66,308.31/99,478.26 = 19,561.23/x
  3. Step 3: Cross multiply
    66,308.31x = 99,478.26 × 19,561.23
  4. Step 4: Simplify right side
    66,308.31x = 1,945,917,123.86
  5. Step 5: Solve for x
    x = 1,945,917,123.86/66,308.31
  6. Step 6: Final answer
    x = 29,346.50

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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.