Home / 91,216.86-125,809.99-78,491.36

Finding the Fourth Proportional to 91,216.86, 125,809.99 and 78,491.36

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Solution

The fourth proportional to 91,216.86, 125,809.99 and 78,491.36 is: 108,258.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,216.86 : 125,809.99 = 78,491.36 : x
  2. Step 2: Convert to fraction form
    91,216.86/125,809.99 = 78,491.36/x
  3. Step 3: Cross multiply
    91,216.86x = 125,809.99 × 78,491.36
  4. Step 4: Simplify right side
    91,216.86x = 9,874,997,776.50
  5. Step 5: Solve for x
    x = 9,874,997,776.50/91,216.86
  6. Step 6: Final answer
    x = 108,258.47

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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.