Home / 100,351.63-138,497.21-57,909.25

Finding the Fourth Proportional to 100,351.63, 138,497.21 and 57,909.25

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Solution

The fourth proportional to 100,351.63, 138,497.21 and 57,909.25 is: 79,921.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,351.63 : 138,497.21 = 57,909.25 : x
  2. Step 2: Convert to fraction form
    100,351.63/138,497.21 = 57,909.25/x
  3. Step 3: Cross multiply
    100,351.63x = 138,497.21 × 57,909.25
  4. Step 4: Simplify right side
    100,351.63x = 8,020,269,558.19
  5. Step 5: Solve for x
    x = 8,020,269,558.19/100,351.63
  6. Step 6: Final answer
    x = 79,921.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.