Home / 285,953.14-428,790.75-86,236.30

Finding the Fourth Proportional to 285,953.14, 428,790.75 and 86,236.30

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Solution

The fourth proportional to 285,953.14, 428,790.75 and 86,236.30 is: 129,312.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,953.14 : 428,790.75 = 86,236.30 : x
  2. Step 2: Convert to fraction form
    285,953.14/428,790.75 = 86,236.30/x
  3. Step 3: Cross multiply
    285,953.14x = 428,790.75 × 86,236.30
  4. Step 4: Simplify right side
    285,953.14x = 36,977,327,754.23
  5. Step 5: Solve for x
    x = 36,977,327,754.23/285,953.14
  6. Step 6: Final answer
    x = 129,312.54

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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.