Home / 81,275.40-121,951.44-28,709.64

Finding the Fourth Proportional to 81,275.40, 121,951.44 and 28,709.64

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Solution

The fourth proportional to 81,275.40, 121,951.44 and 28,709.64 is: 43,078.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,275.40 : 121,951.44 = 28,709.64 : x
  2. Step 2: Convert to fraction form
    81,275.40/121,951.44 = 28,709.64/x
  3. Step 3: Cross multiply
    81,275.40x = 121,951.44 × 28,709.64
  4. Step 4: Simplify right side
    81,275.40x = 3,501,181,939.88
  5. Step 5: Solve for x
    x = 3,501,181,939.88/81,275.40
  6. Step 6: Final answer
    x = 43,078.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.