Home / 81,126.70-121,694.34-25,005.35

Finding the Fourth Proportional to 81,126.70, 121,694.34 and 25,005.35

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Solution

The fourth proportional to 81,126.70, 121,694.34 and 25,005.35 is: 37,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,126.70 : 121,694.34 = 25,005.35 : x
  2. Step 2: Convert to fraction form
    81,126.70/121,694.34 = 25,005.35/x
  3. Step 3: Cross multiply
    81,126.70x = 121,694.34 × 25,005.35
  4. Step 4: Simplify right side
    81,126.70x = 3,043,009,564.72
  5. Step 5: Solve for x
    x = 3,043,009,564.72/81,126.70
  6. Step 6: Final answer
    x = 37,509.35

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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.