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Finding the Fourth Proportional to 66,987.48, 100,483.38 and 20,240.76

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Solution

The fourth proportional to 66,987.48, 100,483.38 and 20,240.76 is: 30,361.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,987.48 : 100,483.38 = 20,240.76 : x
  2. Step 2: Convert to fraction form
    66,987.48/100,483.38 = 20,240.76/x
  3. Step 3: Cross multiply
    66,987.48x = 100,483.38 × 20,240.76
  4. Step 4: Simplify right side
    66,987.48x = 2,033,859,978.57
  5. Step 5: Solve for x
    x = 2,033,859,978.57/66,987.48
  6. Step 6: Final answer
    x = 30,361.79

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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.