Home / 91,940.94-126,585.18-78,458.09

Finding the Fourth Proportional to 91,940.94, 126,585.18 and 78,458.09

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Solution

The fourth proportional to 91,940.94, 126,585.18 and 78,458.09 is: 108,021.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,940.94 : 126,585.18 = 78,458.09 : x
  2. Step 2: Convert to fraction form
    91,940.94/126,585.18 = 78,458.09/x
  3. Step 3: Cross multiply
    91,940.94x = 126,585.18 × 78,458.09
  4. Step 4: Simplify right side
    91,940.94x = 9,931,630,812.18
  5. Step 5: Solve for x
    x = 9,931,630,812.18/91,940.94
  6. Step 6: Final answer
    x = 108,021.85

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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.