Home / 287,530.49-431,300.20-85,147.06

Finding the Fourth Proportional to 287,530.49, 431,300.20 and 85,147.06

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Solution

The fourth proportional to 287,530.49, 431,300.20 and 85,147.06 is: 127,721.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,530.49 : 431,300.20 = 85,147.06 : x
  2. Step 2: Convert to fraction form
    287,530.49/431,300.20 = 85,147.06/x
  3. Step 3: Cross multiply
    287,530.49x = 431,300.20 × 85,147.06
  4. Step 4: Simplify right side
    287,530.49x = 36,723,944,007.41
  5. Step 5: Solve for x
    x = 36,723,944,007.41/287,530.49
  6. Step 6: Final answer
    x = 127,721.91

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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.