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Finding the Fourth Proportional to 135,987.94, 203,911.51 and 61,043.55

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Solution

The fourth proportional to 135,987.94, 203,911.51 and 61,043.55 is: 91,533.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,987.94 : 203,911.51 = 61,043.55 : x
  2. Step 2: Convert to fraction form
    135,987.94/203,911.51 = 61,043.55/x
  3. Step 3: Cross multiply
    135,987.94x = 203,911.51 × 61,043.55
  4. Step 4: Simplify right side
    135,987.94x = 12,447,482,456.26
  5. Step 5: Solve for x
    x = 12,447,482,456.26/135,987.94
  6. Step 6: Final answer
    x = 91,533.72

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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.