Home / 91,269.12-125,036.43-87,857.64

Finding the Fourth Proportional to 91,269.12, 125,036.43 and 87,857.64

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Solution

The fourth proportional to 91,269.12, 125,036.43 and 87,857.64 is: 120,362.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,269.12 : 125,036.43 = 87,857.64 : x
  2. Step 2: Convert to fraction form
    91,269.12/125,036.43 = 87,857.64/x
  3. Step 3: Cross multiply
    91,269.12x = 125,036.43 × 87,857.64
  4. Step 4: Simplify right side
    91,269.12x = 10,985,405,653.83
  5. Step 5: Solve for x
    x = 10,985,405,653.83/91,269.12
  6. Step 6: Final answer
    x = 120,362.79

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.