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Finding the Fourth Proportional to 150,387.37, 207,520.78 and 86,712.87

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Solution

The fourth proportional to 150,387.37, 207,520.78 and 86,712.87 is: 119,655.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,387.37 : 207,520.78 = 86,712.87 : x
  2. Step 2: Convert to fraction form
    150,387.37/207,520.78 = 86,712.87/x
  3. Step 3: Cross multiply
    150,387.37x = 207,520.78 × 86,712.87
  4. Step 4: Simplify right side
    150,387.37x = 17,994,722,418.44
  5. Step 5: Solve for x
    x = 17,994,722,418.44/150,387.37
  6. Step 6: Final answer
    x = 119,655.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.