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Finding the Fourth Proportional to 81,424.10, 122,136.15 and 61,465.70

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Solution

The fourth proportional to 81,424.10, 122,136.15 and 61,465.70 is: 92,198.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,424.10 : 122,136.15 = 61,465.70 : x
  2. Step 2: Convert to fraction form
    81,424.10/122,136.15 = 61,465.70/x
  3. Step 3: Cross multiply
    81,424.10x = 122,136.15 × 61,465.70
  4. Step 4: Simplify right side
    81,424.10x = 7,507,183,955.06
  5. Step 5: Solve for x
    x = 7,507,183,955.06/81,424.10
  6. Step 6: Final answer
    x = 92,198.55

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1.5x scale

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.