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Finding the Fourth Proportional to 135,843.51, 187,464.75 and 84,885.87

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Solution

The fourth proportional to 135,843.51, 187,464.75 and 84,885.87 is: 117,142.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,843.51 : 187,464.75 = 84,885.87 : x
  2. Step 2: Convert to fraction form
    135,843.51/187,464.75 = 84,885.87/x
  3. Step 3: Cross multiply
    135,843.51x = 187,464.75 × 84,885.87
  4. Step 4: Simplify right side
    135,843.51x = 15,913,108,782.75
  5. Step 5: Solve for x
    x = 15,913,108,782.75/135,843.51
  6. Step 6: Final answer
    x = 117,142.94

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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.