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Finding the Fourth Proportional to 139,442.80, 192,448.57 and 79,033

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Solution

The fourth proportional to 139,442.80, 192,448.57 and 79,033 is: 109,075.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,442.80 : 192,448.57 = 79,033 : x
  2. Step 2: Convert to fraction form
    139,442.80/192,448.57 = 79,033/x
  3. Step 3: Cross multiply
    139,442.80x = 192,448.57 × 79,033
  4. Step 4: Simplify right side
    139,442.80x = 15,209,787,832.81
  5. Step 5: Solve for x
    x = 15,209,787,832.81/139,442.80
  6. Step 6: Final answer
    x = 109,075.46

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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.