Home / 81,005.20-121,507.80-25,596.88

Finding the Fourth Proportional to 81,005.20, 121,507.80 and 25,596.88

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Solution

The fourth proportional to 81,005.20, 121,507.80 and 25,596.88 is: 38,395.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,005.20 : 121,507.80 = 25,596.88 : x
  2. Step 2: Convert to fraction form
    81,005.20/121,507.80 = 25,596.88/x
  3. Step 3: Cross multiply
    81,005.20x = 121,507.80 × 25,596.88
  4. Step 4: Simplify right side
    81,005.20x = 3,110,219,840.14
  5. Step 5: Solve for x
    x = 3,110,219,840.14/81,005.20
  6. Step 6: Final answer
    x = 38,395.31

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1.5x scale

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.