Home / 80,785.36-121,228.56-30,869.72

Finding the Fourth Proportional to 80,785.36, 121,228.56 and 30,869.72

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Solution

The fourth proportional to 80,785.36, 121,228.56 and 30,869.72 is: 46,323.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,785.36 : 121,228.56 = 30,869.72 : x
  2. Step 2: Convert to fraction form
    80,785.36/121,228.56 = 30,869.72/x
  3. Step 3: Cross multiply
    80,785.36x = 121,228.56 × 30,869.72
  4. Step 4: Simplify right side
    80,785.36x = 3,742,291,703.20
  5. Step 5: Solve for x
    x = 3,742,291,703.20/80,785.36
  6. Step 6: Final answer
    x = 46,323.88

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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.