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Finding the Fourth Proportional to 66,078.78, 99,065.31 and 34,472.98

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Solution

The fourth proportional to 66,078.78, 99,065.31 and 34,472.98 is: 51,681.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,078.78 : 99,065.31 = 34,472.98 : x
  2. Step 2: Convert to fraction form
    66,078.78/99,065.31 = 34,472.98/x
  3. Step 3: Cross multiply
    66,078.78x = 99,065.31 × 34,472.98
  4. Step 4: Simplify right side
    66,078.78x = 3,415,076,450.32
  5. Step 5: Solve for x
    x = 3,415,076,450.32/66,078.78
  6. Step 6: Final answer
    x = 51,681.89

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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.