Home / 103,822.60-155,405.85-81,515.20

Finding the Fourth Proportional to 103,822.60, 155,405.85 and 81,515.20

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Solution

The fourth proportional to 103,822.60, 155,405.85 and 81,515.20 is: 122,015.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,822.60 : 155,405.85 = 81,515.20 : x
  2. Step 2: Convert to fraction form
    103,822.60/155,405.85 = 81,515.20/x
  3. Step 3: Cross multiply
    103,822.60x = 155,405.85 × 81,515.20
  4. Step 4: Simplify right side
    103,822.60x = 12,667,938,943.92
  5. Step 5: Solve for x
    x = 12,667,938,943.92/103,822.60
  6. Step 6: Final answer
    x = 122,015.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.