Home / 90,844.20-136,136.70-66,965.40

Finding the Fourth Proportional to 90,844.20, 136,136.70 and 66,965.40

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Solution

The fourth proportional to 90,844.20, 136,136.70 and 66,965.40 is: 100,352.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,844.20 : 136,136.70 = 66,965.40 : x
  2. Step 2: Convert to fraction form
    90,844.20/136,136.70 = 66,965.40/x
  3. Step 3: Cross multiply
    90,844.20x = 136,136.70 × 66,965.40
  4. Step 4: Simplify right side
    90,844.20x = 9,116,448,570.18
  5. Step 5: Solve for x
    x = 9,116,448,570.18/90,844.20
  6. Step 6: Final answer
    x = 100,352.57

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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.