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Finding the Fourth Proportional to 139,028.74, 191,792.01 and 82,400.02

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Solution

The fourth proportional to 139,028.74, 191,792.01 and 82,400.02 is: 113,671.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,028.74 : 191,792.01 = 82,400.02 : x
  2. Step 2: Convert to fraction form
    139,028.74/191,792.01 = 82,400.02/x
  3. Step 3: Cross multiply
    139,028.74x = 191,792.01 × 82,400.02
  4. Step 4: Simplify right side
    139,028.74x = 15,803,665,459.84
  5. Step 5: Solve for x
    x = 15,803,665,459.84/139,028.74
  6. Step 6: Final answer
    x = 113,671.93

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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.