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Finding the Fourth Proportional to 66,740.60, 100,081.38 and 19,984.76

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Solution

The fourth proportional to 66,740.60, 100,081.38 and 19,984.76 is: 29,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,740.60 : 100,081.38 = 19,984.76 : x
  2. Step 2: Convert to fraction form
    66,740.60/100,081.38 = 19,984.76/x
  3. Step 3: Cross multiply
    66,740.60x = 100,081.38 × 19,984.76
  4. Step 4: Simplify right side
    66,740.60x = 2,000,102,359.77
  5. Step 5: Solve for x
    x = 2,000,102,359.77/66,740.60
  6. Step 6: Final answer
    x = 29,968.30

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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.