Home / 66,122.24-91,208.40-39,246.56

Finding the Fourth Proportional to 66,122.24, 91,208.40 and 39,246.56

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Solution

The fourth proportional to 66,122.24, 91,208.40 and 39,246.56 is: 54,136.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,122.24 : 91,208.40 = 39,246.56 : x
  2. Step 2: Convert to fraction form
    66,122.24/91,208.40 = 39,246.56/x
  3. Step 3: Cross multiply
    66,122.24x = 91,208.40 × 39,246.56
  4. Step 4: Simplify right side
    66,122.24x = 3,579,615,943.10
  5. Step 5: Solve for x
    x = 3,579,615,943.10/66,122.24
  6. Step 6: Final answer
    x = 54,136.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.