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Finding the Fourth Proportional to 139,361.48, 192,322.42 and 75,702.92

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Solution

The fourth proportional to 139,361.48, 192,322.42 and 75,702.92 is: 104,471.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,361.48 : 192,322.42 = 75,702.92 : x
  2. Step 2: Convert to fraction form
    139,361.48/192,322.42 = 75,702.92/x
  3. Step 3: Cross multiply
    139,361.48x = 192,322.42 × 75,702.92
  4. Step 4: Simplify right side
    139,361.48x = 14,559,368,775.47
  5. Step 5: Solve for x
    x = 14,559,368,775.47/139,361.48
  6. Step 6: Final answer
    x = 104,471.97

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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.