Home / 129,281.36-178,282.91-86,262.60

Finding the Fourth Proportional to 129,281.36, 178,282.91 and 86,262.60

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Solution

The fourth proportional to 129,281.36, 178,282.91 and 86,262.60 is: 118,958.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,281.36 : 178,282.91 = 86,262.60 : x
  2. Step 2: Convert to fraction form
    129,281.36/178,282.91 = 86,262.60/x
  3. Step 3: Cross multiply
    129,281.36x = 178,282.91 × 86,262.60
  4. Step 4: Simplify right side
    129,281.36x = 15,379,146,475.15
  5. Step 5: Solve for x
    x = 15,379,146,475.15/129,281.36
  6. Step 6: Final answer
    x = 118,958.73

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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.