Home / 75,405.72-103,990.37-51,242.75

Finding the Fourth Proportional to 75,405.72, 103,990.37 and 51,242.75

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Solution

The fourth proportional to 75,405.72, 103,990.37 and 51,242.75 is: 70,667.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,405.72 : 103,990.37 = 51,242.75 : x
  2. Step 2: Convert to fraction form
    75,405.72/103,990.37 = 51,242.75/x
  3. Step 3: Cross multiply
    75,405.72x = 103,990.37 × 51,242.75
  4. Step 4: Simplify right side
    75,405.72x = 5,328,752,532.32
  5. Step 5: Solve for x
    x = 5,328,752,532.32/75,405.72
  6. Step 6: Final answer
    x = 70,667.75

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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.