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Finding the Fourth Proportional to 139,438.53, 192,427.25 and 75,776.38

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Solution

The fourth proportional to 139,438.53, 192,427.25 and 75,776.38 is: 104,572.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,438.53 : 192,427.25 = 75,776.38 : x
  2. Step 2: Convert to fraction form
    139,438.53/192,427.25 = 75,776.38/x
  3. Step 3: Cross multiply
    139,438.53x = 192,427.25 × 75,776.38
  4. Step 4: Simplify right side
    139,438.53x = 14,581,439,558.41
  5. Step 5: Solve for x
    x = 14,581,439,558.41/139,438.53
  6. Step 6: Final answer
    x = 104,572.53

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1.5x scale

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.