Home / 287,615.36-431,424-87,934.96

Finding the Fourth Proportional to 287,615.36, 431,424 and 87,934.96

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Solution

The fourth proportional to 287,615.36, 431,424 and 87,934.96 is: 131,902.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,615.36 : 431,424 = 87,934.96 : x
  2. Step 2: Convert to fraction form
    287,615.36/431,424 = 87,934.96/x
  3. Step 3: Cross multiply
    287,615.36x = 431,424 × 87,934.96
  4. Step 4: Simplify right side
    287,615.36x = 37,937,252,183.04
  5. Step 5: Solve for x
    x = 37,937,252,183.04/287,615.36
  6. Step 6: Final answer
    x = 131,902.73

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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.