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Finding the Fourth Proportional to 139,448.59, 192,423.80 and 79,018.13

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Solution

The fourth proportional to 139,448.59, 192,423.80 and 79,018.13 is: 109,036.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,448.59 : 192,423.80 = 79,018.13 : x
  2. Step 2: Convert to fraction form
    139,448.59/192,423.80 = 79,018.13/x
  3. Step 3: Cross multiply
    139,448.59x = 192,423.80 × 79,018.13
  4. Step 4: Simplify right side
    139,448.59x = 15,204,969,522.10
  5. Step 5: Solve for x
    x = 15,204,969,522.10/139,448.59
  6. Step 6: Final answer
    x = 109,036.38

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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.