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Finding the Fourth Proportional to 139,478.64, 192,481.74 and 75,816.42

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Solution

The fourth proportional to 139,478.64, 192,481.74 and 75,816.42 is: 104,627.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,478.64 : 192,481.74 = 75,816.42 : x
  2. Step 2: Convert to fraction form
    139,478.64/192,481.74 = 75,816.42/x
  3. Step 3: Cross multiply
    139,478.64x = 192,481.74 × 75,816.42
  4. Step 4: Simplify right side
    139,478.64x = 14,593,276,442.17
  5. Step 5: Solve for x
    x = 14,593,276,442.17/139,478.64
  6. Step 6: Final answer
    x = 104,627.32

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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.