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Finding the Fourth Proportional to 139,725.16, 192,820.75 and 76,062.94

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Solution

The fourth proportional to 139,725.16, 192,820.75 and 76,062.94 is: 104,966.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,725.16 : 192,820.75 = 76,062.94 : x
  2. Step 2: Convert to fraction form
    139,725.16/192,820.75 = 76,062.94/x
  3. Step 3: Cross multiply
    139,725.16x = 192,820.75 × 76,062.94
  4. Step 4: Simplify right side
    139,725.16x = 14,666,512,465.80
  5. Step 5: Solve for x
    x = 14,666,512,465.80/139,725.16
  6. Step 6: Final answer
    x = 104,966.87

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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.