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Finding the Fourth Proportional to 85,189.74, 127,689.03 and 28,977.36

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Solution

The fourth proportional to 85,189.74, 127,689.03 and 28,977.36 is: 43,433.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,189.74 : 127,689.03 = 28,977.36 : x
  2. Step 2: Convert to fraction form
    85,189.74/127,689.03 = 28,977.36/x
  3. Step 3: Cross multiply
    85,189.74x = 127,689.03 × 28,977.36
  4. Step 4: Simplify right side
    85,189.74x = 3,700,090,990.36
  5. Step 5: Solve for x
    x = 3,700,090,990.36/85,189.74
  6. Step 6: Final answer
    x = 43,433.53

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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.