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Finding the Fourth Proportional to 139,501.64, 192,513.48 and 75,839.48

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Solution

The fourth proportional to 139,501.64, 192,513.48 and 75,839.48 is: 104,659.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,501.64 : 192,513.48 = 75,839.48 : x
  2. Step 2: Convert to fraction form
    139,501.64/192,513.48 = 75,839.48/x
  3. Step 3: Cross multiply
    139,501.64x = 192,513.48 × 75,839.48
  4. Step 4: Simplify right side
    139,501.64x = 14,600,122,216.19
  5. Step 5: Solve for x
    x = 14,600,122,216.19/139,501.64
  6. Step 6: Final answer
    x = 104,659.14

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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.