Home / 66,739.60-100,079.88-19,983.76

Finding the Fourth Proportional to 66,739.60, 100,079.88 and 19,983.76

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Solution

The fourth proportional to 66,739.60, 100,079.88 and 19,983.76 is: 29,966.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,739.60 : 100,079.88 = 19,983.76 : x
  2. Step 2: Convert to fraction form
    66,739.60/100,079.88 = 19,983.76/x
  3. Step 3: Cross multiply
    66,739.60x = 100,079.88 × 19,983.76
  4. Step 4: Simplify right side
    66,739.60x = 1,999,972,302.75
  5. Step 5: Solve for x
    x = 1,999,972,302.75/66,739.60
  6. Step 6: Final answer
    x = 29,966.80

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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.