Home / 145,014.45-200,121.31-81,353.62

Finding the Fourth Proportional to 145,014.45, 200,121.31 and 81,353.62

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Solution

The fourth proportional to 145,014.45, 200,121.31 and 81,353.62 is: 112,268.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,014.45 : 200,121.31 = 81,353.62 : x
  2. Step 2: Convert to fraction form
    145,014.45/200,121.31 = 81,353.62/x
  3. Step 3: Cross multiply
    145,014.45x = 200,121.31 × 81,353.62
  4. Step 4: Simplify right side
    145,014.45x = 16,280,593,007.64
  5. Step 5: Solve for x
    x = 16,280,593,007.64/145,014.45
  6. Step 6: Final answer
    x = 112,268.76

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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.