Home / 285,983.15-428,977.78-86,305.32

Finding the Fourth Proportional to 285,983.15, 428,977.78 and 86,305.32

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Solution

The fourth proportional to 285,983.15, 428,977.78 and 86,305.32 is: 129,458.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,983.15 : 428,977.78 = 86,305.32 : x
  2. Step 2: Convert to fraction form
    285,983.15/428,977.78 = 86,305.32/x
  3. Step 3: Cross multiply
    285,983.15x = 428,977.78 × 86,305.32
  4. Step 4: Simplify right side
    285,983.15x = 37,023,065,756.12
  5. Step 5: Solve for x
    x = 37,023,065,756.12/285,983.15
  6. Step 6: Final answer
    x = 129,458.91

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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.