Home / 130,576.05-180,128.61-85,280.56

Finding the Fourth Proportional to 130,576.05, 180,128.61 and 85,280.56

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Solution

The fourth proportional to 130,576.05, 180,128.61 and 85,280.56 is: 117,643.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,576.05 : 180,128.61 = 85,280.56 : x
  2. Step 2: Convert to fraction form
    130,576.05/180,128.61 = 85,280.56/x
  3. Step 3: Cross multiply
    130,576.05x = 180,128.61 × 85,280.56
  4. Step 4: Simplify right side
    130,576.05x = 15,361,468,732.82
  5. Step 5: Solve for x
    x = 15,361,468,732.82/130,576.05
  6. Step 6: Final answer
    x = 117,643.85

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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.