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Finding the Fourth Proportional to 139,392.44, 192,362.28 and 75,730.40

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Solution

The fourth proportional to 139,392.44, 192,362.28 and 75,730.40 is: 104,508.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,392.44 : 192,362.28 = 75,730.40 : x
  2. Step 2: Convert to fraction form
    139,392.44/192,362.28 = 75,730.40/x
  3. Step 3: Cross multiply
    139,392.44x = 192,362.28 × 75,730.40
  4. Step 4: Simplify right side
    139,392.44x = 14,567,672,409.31
  5. Step 5: Solve for x
    x = 14,567,672,409.31/139,392.44
  6. Step 6: Final answer
    x = 104,508.34

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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.