Home / 80,591.36-120,802.64-30,640.28

Finding the Fourth Proportional to 80,591.36, 120,802.64 and 30,640.28

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Solution

The fourth proportional to 80,591.36, 120,802.64 and 30,640.28 is: 45,928.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,591.36 : 120,802.64 = 30,640.28 : x
  2. Step 2: Convert to fraction form
    80,591.36/120,802.64 = 30,640.28/x
  3. Step 3: Cross multiply
    80,591.36x = 120,802.64 × 30,640.28
  4. Step 4: Simplify right side
    80,591.36x = 3,701,426,714.34
  5. Step 5: Solve for x
    x = 3,701,426,714.34/80,591.36
  6. Step 6: Final answer
    x = 45,928.33

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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.