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Finding the Fourth Proportional to 87,038, 130,354.52 and 84,643.56

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Solution

The fourth proportional to 87,038, 130,354.52 and 84,643.56 is: 126,768.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,038 : 130,354.52 = 84,643.56 : x
  2. Step 2: Convert to fraction form
    87,038/130,354.52 = 84,643.56/x
  3. Step 3: Cross multiply
    87,038x = 130,354.52 × 84,643.56
  4. Step 4: Simplify right side
    87,038x = 11,033,670,634.89
  5. Step 5: Solve for x
    x = 11,033,670,634.89/87,038
  6. Step 6: Final answer
    x = 126,768.43

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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.