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Finding the Fourth Proportional to 145,395.55, 200,644.74 and 80,865.37

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Solution

The fourth proportional to 145,395.55, 200,644.74 and 80,865.37 is: 111,593.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,395.55 : 200,644.74 = 80,865.37 : x
  2. Step 2: Convert to fraction form
    145,395.55/200,644.74 = 80,865.37/x
  3. Step 3: Cross multiply
    145,395.55x = 200,644.74 × 80,865.37
  4. Step 4: Simplify right side
    145,395.55x = 16,225,211,138.65
  5. Step 5: Solve for x
    x = 16,225,211,138.65/145,395.55
  6. Step 6: Final answer
    x = 111,593.59

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1.5x scale

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.