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Finding the Fourth Proportional to 66,073.95, 99,078.01 and 21,089.41

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Solution

The fourth proportional to 66,073.95, 99,078.01 and 21,089.41 is: 31,623.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,073.95 : 99,078.01 = 21,089.41 : x
  2. Step 2: Convert to fraction form
    66,073.95/99,078.01 = 21,089.41/x
  3. Step 3: Cross multiply
    66,073.95x = 99,078.01 × 21,089.41
  4. Step 4: Simplify right side
    66,073.95x = 2,089,496,474.46
  5. Step 5: Solve for x
    x = 2,089,496,474.46/66,073.95
  6. Step 6: Final answer
    x = 31,623.60

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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.