Home / 130,578.05-180,131.37-85,282.56

Finding the Fourth Proportional to 130,578.05, 180,131.37 and 85,282.56

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Solution

The fourth proportional to 130,578.05, 180,131.37 and 85,282.56 is: 117,646.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,578.05 : 180,131.37 = 85,282.56 : x
  2. Step 2: Convert to fraction form
    130,578.05/180,131.37 = 85,282.56/x
  3. Step 3: Cross multiply
    130,578.05x = 180,131.37 × 85,282.56
  4. Step 4: Simplify right side
    130,578.05x = 15,362,064,369.91
  5. Step 5: Solve for x
    x = 15,362,064,369.91/130,578.05
  6. Step 6: Final answer
    x = 117,646.61

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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.