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Finding the Fourth Proportional to 57,991.40, 86,987.10 and 26,887.40

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Solution

The fourth proportional to 57,991.40, 86,987.10 and 26,887.40 is: 40,331.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,991.40 : 86,987.10 = 26,887.40 : x
  2. Step 2: Convert to fraction form
    57,991.40/86,987.10 = 26,887.40/x
  3. Step 3: Cross multiply
    57,991.40x = 86,987.10 × 26,887.40
  4. Step 4: Simplify right side
    57,991.40x = 2,338,856,952.54
  5. Step 5: Solve for x
    x = 2,338,856,952.54/57,991.40
  6. Step 6: Final answer
    x = 40,331.10

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1.5x scale

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.