Home / 72,128.32-108,192.44-30,007.60

Finding the Fourth Proportional to 72,128.32, 108,192.44 and 30,007.60

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Solution

The fourth proportional to 72,128.32, 108,192.44 and 30,007.60 is: 45,011.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,128.32 : 108,192.44 = 30,007.60 : x
  2. Step 2: Convert to fraction form
    72,128.32/108,192.44 = 30,007.60/x
  3. Step 3: Cross multiply
    72,128.32x = 108,192.44 × 30,007.60
  4. Step 4: Simplify right side
    72,128.32x = 3,246,595,462.54
  5. Step 5: Solve for x
    x = 3,246,595,462.54/72,128.32
  6. Step 6: Final answer
    x = 45,011.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.