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Finding the Fourth Proportional to 150,642.45, 207,884.76 and 86,978.88

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Solution

The fourth proportional to 150,642.45, 207,884.76 and 86,978.88 is: 120,029.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,642.45 : 207,884.76 = 86,978.88 : x
  2. Step 2: Convert to fraction form
    150,642.45/207,884.76 = 86,978.88/x
  3. Step 3: Cross multiply
    150,642.45x = 207,884.76 × 86,978.88
  4. Step 4: Simplify right side
    150,642.45x = 18,081,583,593.87
  5. Step 5: Solve for x
    x = 18,081,583,593.87/150,642.45
  6. Step 6: Final answer
    x = 120,029.80

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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.