Home / 139,199.06-192,092-78,768.60

Finding the Fourth Proportional to 139,199.06, 192,092 and 78,768.60

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Solution

The fourth proportional to 139,199.06, 192,092 and 78,768.60 is: 108,699.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,199.06 : 192,092 = 78,768.60 : x
  2. Step 2: Convert to fraction form
    139,199.06/192,092 = 78,768.60/x
  3. Step 3: Cross multiply
    139,199.06x = 192,092 × 78,768.60
  4. Step 4: Simplify right side
    139,199.06x = 15,130,817,911.20
  5. Step 5: Solve for x
    x = 15,130,817,911.20/139,199.06
  6. Step 6: Final answer
    x = 108,699.14

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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.