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Finding the Fourth Proportional to 138,915.93, 191,704.07 and 75,253.98

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Solution

The fourth proportional to 138,915.93, 191,704.07 and 75,253.98 is: 103,850.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,915.93 : 191,704.07 = 75,253.98 : x
  2. Step 2: Convert to fraction form
    138,915.93/191,704.07 = 75,253.98/x
  3. Step 3: Cross multiply
    138,915.93x = 191,704.07 × 75,253.98
  4. Step 4: Simplify right side
    138,915.93x = 14,426,494,437.83
  5. Step 5: Solve for x
    x = 14,426,494,437.83/138,915.93
  6. Step 6: Final answer
    x = 103,850.54

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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.