Home / 130,371.49-179,915.21-85,078.45

Finding the Fourth Proportional to 130,371.49, 179,915.21 and 85,078.45

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Solution

The fourth proportional to 130,371.49, 179,915.21 and 85,078.45 is: 117,409.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,371.49 : 179,915.21 = 85,078.45 : x
  2. Step 2: Convert to fraction form
    130,371.49/179,915.21 = 85,078.45/x
  3. Step 3: Cross multiply
    130,371.49x = 179,915.21 × 85,078.45
  4. Step 4: Simplify right side
    130,371.49x = 15,306,907,198.22
  5. Step 5: Solve for x
    x = 15,306,907,198.22/130,371.49
  6. Step 6: Final answer
    x = 117,409.93

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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.