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Finding the Fourth Proportional to 139,486.86, 192,490.02 and 75,825.72

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Solution

The fourth proportional to 139,486.86, 192,490.02 and 75,825.72 is: 104,638.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,486.86 : 192,490.02 = 75,825.72 : x
  2. Step 2: Convert to fraction form
    139,486.86/192,490.02 = 75,825.72/x
  3. Step 3: Cross multiply
    139,486.86x = 192,490.02 × 75,825.72
  4. Step 4: Simplify right side
    139,486.86x = 14,595,694,359.31
  5. Step 5: Solve for x
    x = 14,595,694,359.31/139,486.86
  6. Step 6: Final answer
    x = 104,638.49

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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.