Home / 287,400.24-431,100.27-87,721.56

Finding the Fourth Proportional to 287,400.24, 431,100.27 and 87,721.56

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Solution

The fourth proportional to 287,400.24, 431,100.27 and 87,721.56 is: 131,582.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,400.24 : 431,100.27 = 87,721.56 : x
  2. Step 2: Convert to fraction form
    287,400.24/431,100.27 = 87,721.56/x
  3. Step 3: Cross multiply
    287,400.24x = 431,100.27 × 87,721.56
  4. Step 4: Simplify right side
    287,400.24x = 37,816,788,200.82
  5. Step 5: Solve for x
    x = 37,816,788,200.82/287,400.24
  6. Step 6: Final answer
    x = 131,582.31

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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.