Home / 84,012.72-126,036.36-57,729.84

Finding the Fourth Proportional to 84,012.72, 126,036.36 and 57,729.84

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Solution

The fourth proportional to 84,012.72, 126,036.36 and 57,729.84 is: 86,606.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,012.72 : 126,036.36 = 57,729.84 : x
  2. Step 2: Convert to fraction form
    84,012.72/126,036.36 = 57,729.84/x
  3. Step 3: Cross multiply
    84,012.72x = 126,036.36 × 57,729.84
  4. Step 4: Simplify right side
    84,012.72x = 7,276,058,896.98
  5. Step 5: Solve for x
    x = 7,276,058,896.98/84,012.72
  6. Step 6: Final answer
    x = 86,606.63

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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.