Home / 130,945.92-180,720-74,367.36

Finding the Fourth Proportional to 130,945.92, 180,720 and 74,367.36

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Solution

The fourth proportional to 130,945.92, 180,720 and 74,367.36 is: 102,635.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,945.92 : 180,720 = 74,367.36 : x
  2. Step 2: Convert to fraction form
    130,945.92/180,720 = 74,367.36/x
  3. Step 3: Cross multiply
    130,945.92x = 180,720 × 74,367.36
  4. Step 4: Simplify right side
    130,945.92x = 13,439,669,299.20
  5. Step 5: Solve for x
    x = 13,439,669,299.20/130,945.92
  6. Step 6: Final answer
    x = 102,635.27

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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.