Home / 145,426.11-200,690.54-80,900.50

Finding the Fourth Proportional to 145,426.11, 200,690.54 and 80,900.50

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Solution

The fourth proportional to 145,426.11, 200,690.54 and 80,900.50 is: 111,644.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,426.11 : 200,690.54 = 80,900.50 : x
  2. Step 2: Convert to fraction form
    145,426.11/200,690.54 = 80,900.50/x
  3. Step 3: Cross multiply
    145,426.11x = 200,690.54 × 80,900.50
  4. Step 4: Simplify right side
    145,426.11x = 16,235,965,031.27
  5. Step 5: Solve for x
    x = 16,235,965,031.27/145,426.11
  6. Step 6: Final answer
    x = 111,644.09

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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.