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Finding the Fourth Proportional to 139,256.84, 192,175.02 and 78,839.14

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Solution

The fourth proportional to 139,256.84, 192,175.02 and 78,839.14 is: 108,798.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,256.84 : 192,175.02 = 78,839.14 : x
  2. Step 2: Convert to fraction form
    139,256.84/192,175.02 = 78,839.14/x
  3. Step 3: Cross multiply
    139,256.84x = 192,175.02 × 78,839.14
  4. Step 4: Simplify right side
    139,256.84x = 15,150,913,759.01
  5. Step 5: Solve for x
    x = 15,150,913,759.01/139,256.84
  6. Step 6: Final answer
    x = 108,798.34

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1.5x scale

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.