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Finding the Fourth Proportional to 139,633.38, 192,688.34 and 75,971.21

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Solution

The fourth proportional to 139,633.38, 192,688.34 and 75,971.21 is: 104,837.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,633.38 : 192,688.34 = 75,971.21 : x
  2. Step 2: Convert to fraction form
    139,633.38/192,688.34 = 75,971.21/x
  3. Step 3: Cross multiply
    139,633.38x = 192,688.34 × 75,971.21
  4. Step 4: Simplify right side
    139,633.38x = 14,638,764,999.39
  5. Step 5: Solve for x
    x = 14,638,764,999.39/139,633.38
  6. Step 6: Final answer
    x = 104,837.15

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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.