Home / 287,238.07-431,053.92-100,249.57

Finding the Fourth Proportional to 287,238.07, 431,053.92 and 100,249.57

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Solution

The fourth proportional to 287,238.07, 431,053.92 and 100,249.57 is: 150,443.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,238.07 : 431,053.92 = 100,249.57 : x
  2. Step 2: Convert to fraction form
    287,238.07/431,053.92 = 100,249.57/x
  3. Step 3: Cross multiply
    287,238.07x = 431,053.92 × 100,249.57
  4. Step 4: Simplify right side
    287,238.07x = 43,212,970,126.81
  5. Step 5: Solve for x
    x = 43,212,970,126.81/287,238.07
  6. Step 6: Final answer
    x = 150,443.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.