Home / 81,720.33-112,768.26-45,915.72

Finding the Fourth Proportional to 81,720.33, 112,768.26 and 45,915.72

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Solution

The fourth proportional to 81,720.33, 112,768.26 and 45,915.72 is: 63,360.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.33 : 112,768.26 = 45,915.72 : x
  2. Step 2: Convert to fraction form
    81,720.33/112,768.26 = 45,915.72/x
  3. Step 3: Cross multiply
    81,720.33x = 112,768.26 × 45,915.72
  4. Step 4: Simplify right side
    81,720.33x = 5,177,835,851.05
  5. Step 5: Solve for x
    x = 5,177,835,851.05/81,720.33
  6. Step 6: Final answer
    x = 63,360.44

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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.