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Finding the Fourth Proportional to 57,371.76, 86,055.30 and 19,940.32

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Solution

The fourth proportional to 57,371.76, 86,055.30 and 19,940.32 is: 29,909.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,371.76 : 86,055.30 = 19,940.32 : x
  2. Step 2: Convert to fraction form
    57,371.76/86,055.30 = 19,940.32/x
  3. Step 3: Cross multiply
    57,371.76x = 86,055.30 × 19,940.32
  4. Step 4: Simplify right side
    57,371.76x = 1,715,970,219.70
  5. Step 5: Solve for x
    x = 1,715,970,219.70/57,371.76
  6. Step 6: Final answer
    x = 29,909.67

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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.