Home / 145,139.72-200,311.97-81,477.52

Finding the Fourth Proportional to 145,139.72, 200,311.97 and 81,477.52

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Solution

The fourth proportional to 145,139.72, 200,311.97 and 81,477.52 is: 112,449.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,139.72 : 200,311.97 = 81,477.52 : x
  2. Step 2: Convert to fraction form
    145,139.72/200,311.97 = 81,477.52/x
  3. Step 3: Cross multiply
    145,139.72x = 200,311.97 × 81,477.52
  4. Step 4: Simplify right side
    145,139.72x = 16,320,921,633.75
  5. Step 5: Solve for x
    x = 16,320,921,633.75/145,139.72
  6. Step 6: Final answer
    x = 112,449.73

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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.