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Finding the Fourth Proportional to 139,475.68, 192,475.29 and 75,813.28

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Solution

The fourth proportional to 139,475.68, 192,475.29 and 75,813.28 is: 104,621.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,475.68 : 192,475.29 = 75,813.28 : x
  2. Step 2: Convert to fraction form
    139,475.68/192,475.29 = 75,813.28/x
  3. Step 3: Cross multiply
    139,475.68x = 192,475.29 × 75,813.28
  4. Step 4: Simplify right side
    139,475.68x = 14,592,183,053.85
  5. Step 5: Solve for x
    x = 14,592,183,053.85/139,475.68
  6. Step 6: Final answer
    x = 104,621.70

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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.