Home / 320,280.32-480,427.68-109,920

Finding the Fourth Proportional to 320,280.32, 480,427.68 and 109,920

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Solution

The fourth proportional to 320,280.32, 480,427.68 and 109,920 is: 164,882.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,280.32 : 480,427.68 = 109,920 : x
  2. Step 2: Convert to fraction form
    320,280.32/480,427.68 = 109,920/x
  3. Step 3: Cross multiply
    320,280.32x = 480,427.68 × 109,920
  4. Step 4: Simplify right side
    320,280.32x = 52,808,610,585.60
  5. Step 5: Solve for x
    x = 52,808,610,585.60/320,280.32
  6. Step 6: Final answer
    x = 164,882.47

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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.