Home / 287,123.09-430,651.83-76,777.43

Finding the Fourth Proportional to 287,123.09, 430,651.83 and 76,777.43

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Solution

The fourth proportional to 287,123.09, 430,651.83 and 76,777.43 is: 115,157.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,123.09 : 430,651.83 = 76,777.43 : x
  2. Step 2: Convert to fraction form
    287,123.09/430,651.83 = 76,777.43/x
  3. Step 3: Cross multiply
    287,123.09x = 430,651.83 × 76,777.43
  4. Step 4: Simplify right side
    287,123.09x = 33,064,340,732.20
  5. Step 5: Solve for x
    x = 33,064,340,732.20/287,123.09
  6. Step 6: Final answer
    x = 115,157.37

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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.