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Finding the Fourth Proportional to 139,320.96, 192,263.64 and 75,659.28

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Solution

The fourth proportional to 139,320.96, 192,263.64 and 75,659.28 is: 104,410.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,320.96 : 192,263.64 = 75,659.28 : x
  2. Step 2: Convert to fraction form
    139,320.96/192,263.64 = 75,659.28/x
  3. Step 3: Cross multiply
    139,320.96x = 192,263.64 × 75,659.28
  4. Step 4: Simplify right side
    139,320.96x = 14,546,528,572.58
  5. Step 5: Solve for x
    x = 14,546,528,572.58/139,320.96
  6. Step 6: Final answer
    x = 104,410.19

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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.