Home / 81,131.04-112,533.66-78,973.20

Finding the Fourth Proportional to 81,131.04, 112,533.66 and 78,973.20

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Solution

The fourth proportional to 81,131.04, 112,533.66 and 78,973.20 is: 109,540.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,131.04 : 112,533.66 = 78,973.20 : x
  2. Step 2: Convert to fraction form
    81,131.04/112,533.66 = 78,973.20/x
  3. Step 3: Cross multiply
    81,131.04x = 112,533.66 × 78,973.20
  4. Step 4: Simplify right side
    81,131.04x = 8,887,143,237.91
  5. Step 5: Solve for x
    x = 8,887,143,237.91/81,131.04
  6. Step 6: Final answer
    x = 109,540.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.