Home / 130,521.30-180,103.32-79,515.54

Finding the Fourth Proportional to 130,521.30, 180,103.32 and 79,515.54

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Solution

The fourth proportional to 130,521.30, 180,103.32 and 79,515.54 is: 109,721.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,521.30 : 180,103.32 = 79,515.54 : x
  2. Step 2: Convert to fraction form
    130,521.30/180,103.32 = 79,515.54/x
  3. Step 3: Cross multiply
    130,521.30x = 180,103.32 × 79,515.54
  4. Step 4: Simplify right side
    130,521.30x = 14,321,012,745.59
  5. Step 5: Solve for x
    x = 14,321,012,745.59/130,521.30
  6. Step 6: Final answer
    x = 109,721.65

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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.