Home / 139,621.04-192,677.08-79,172.32

Finding the Fourth Proportional to 139,621.04, 192,677.08 and 79,172.32

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Solution

The fourth proportional to 139,621.04, 192,677.08 and 79,172.32 is: 109,257.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,621.04 : 192,677.08 = 79,172.32 : x
  2. Step 2: Convert to fraction form
    139,621.04/192,677.08 = 79,172.32/x
  3. Step 3: Cross multiply
    139,621.04x = 192,677.08 × 79,172.32
  4. Step 4: Simplify right side
    139,621.04x = 15,254,691,434.43
  5. Step 5: Solve for x
    x = 15,254,691,434.43/139,621.04
  6. Step 6: Final answer
    x = 109,257.83

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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.