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Finding the Fourth Proportional to 139,580.53, 192,611.65 and 75,916.96

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Solution

The fourth proportional to 139,580.53, 192,611.65 and 75,916.96 is: 104,760.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,580.53 : 192,611.65 = 75,916.96 : x
  2. Step 2: Convert to fraction form
    139,580.53/192,611.65 = 75,916.96/x
  3. Step 3: Cross multiply
    139,580.53x = 192,611.65 × 75,916.96
  4. Step 4: Simplify right side
    139,580.53x = 14,622,490,928.58
  5. Step 5: Solve for x
    x = 14,622,490,928.58/139,580.53
  6. Step 6: Final answer
    x = 104,760.25

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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.