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Finding the Fourth Proportional to 139,308.56, 192,244.13 and 75,646.81

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Solution

The fourth proportional to 139,308.56, 192,244.13 and 75,646.81 is: 104,391.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,308.56 : 192,244.13 = 75,646.81 : x
  2. Step 2: Convert to fraction form
    139,308.56/192,244.13 = 75,646.81/x
  3. Step 3: Cross multiply
    139,308.56x = 192,244.13 × 75,646.81
  4. Step 4: Simplify right side
    139,308.56x = 14,542,655,746.99
  5. Step 5: Solve for x
    x = 14,542,655,746.99/139,308.56
  6. Step 6: Final answer
    x = 104,391.69

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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.