Home / 135,975.20-203,962.80-86,111.60

Finding the Fourth Proportional to 135,975.20, 203,962.80 and 86,111.60

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Solution

The fourth proportional to 135,975.20, 203,962.80 and 86,111.60 is: 129,167.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,975.20 : 203,962.80 = 86,111.60 : x
  2. Step 2: Convert to fraction form
    135,975.20/203,962.80 = 86,111.60/x
  3. Step 3: Cross multiply
    135,975.20x = 203,962.80 × 86,111.60
  4. Step 4: Simplify right side
    135,975.20x = 17,563,563,048.48
  5. Step 5: Solve for x
    x = 17,563,563,048.48/135,975.20
  6. Step 6: Final answer
    x = 129,167.40

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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.