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Finding the Fourth Proportional to 74,625.61, 102,990.60 and 55,729.93

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Solution

The fourth proportional to 74,625.61, 102,990.60 and 55,729.93 is: 76,912.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,625.61 : 102,990.60 = 55,729.93 : x
  2. Step 2: Convert to fraction form
    74,625.61/102,990.60 = 55,729.93/x
  3. Step 3: Cross multiply
    74,625.61x = 102,990.60 × 55,729.93
  4. Step 4: Simplify right side
    74,625.61x = 5,739,658,928.66
  5. Step 5: Solve for x
    x = 5,739,658,928.66/74,625.61
  6. Step 6: Final answer
    x = 76,912.72

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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.