Home / 287,528.68-431,297.49-85,145.25

Finding the Fourth Proportional to 287,528.68, 431,297.49 and 85,145.25

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Solution

The fourth proportional to 287,528.68, 431,297.49 and 85,145.25 is: 127,719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,528.68 : 431,297.49 = 85,145.25 : x
  2. Step 2: Convert to fraction form
    287,528.68/431,297.49 = 85,145.25/x
  3. Step 3: Cross multiply
    287,528.68x = 431,297.49 × 85,145.25
  4. Step 4: Simplify right side
    287,528.68x = 36,722,934,115.00
  5. Step 5: Solve for x
    x = 36,722,934,115.00/287,528.68
  6. Step 6: Final answer
    x = 127,719.21

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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.