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Finding the Fourth Proportional to 139,173.51, 192,060.68 and 75,512.57

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Solution

The fourth proportional to 139,173.51, 192,060.68 and 75,512.57 is: 104,208.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,173.51 : 192,060.68 = 75,512.57 : x
  2. Step 2: Convert to fraction form
    139,173.51/192,060.68 = 75,512.57/x
  3. Step 3: Cross multiply
    139,173.51x = 192,060.68 × 75,512.57
  4. Step 4: Simplify right side
    139,173.51x = 14,502,995,165.18
  5. Step 5: Solve for x
    x = 14,502,995,165.18/139,173.51
  6. Step 6: Final answer
    x = 104,208.01

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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.