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Finding the Fourth Proportional to 66,047.82, 99,038.79 and 21,669.54

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Solution

The fourth proportional to 66,047.82, 99,038.79 and 21,669.54 is: 32,493.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,047.82 : 99,038.79 = 21,669.54 : x
  2. Step 2: Convert to fraction form
    66,047.82/99,038.79 = 21,669.54/x
  3. Step 3: Cross multiply
    66,047.82x = 99,038.79 × 21,669.54
  4. Step 4: Simplify right side
    66,047.82x = 2,146,125,021.46
  5. Step 5: Solve for x
    x = 2,146,125,021.46/66,047.82
  6. Step 6: Final answer
    x = 32,493.50

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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.