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Finding the Fourth Proportional to 66,971.40, 100,457.10 and 43,351.80

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Solution

The fourth proportional to 66,971.40, 100,457.10 and 43,351.80 is: 65,027.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,971.40 : 100,457.10 = 43,351.80 : x
  2. Step 2: Convert to fraction form
    66,971.40/100,457.10 = 43,351.80/x
  3. Step 3: Cross multiply
    66,971.40x = 100,457.10 × 43,351.80
  4. Step 4: Simplify right side
    66,971.40x = 4,354,996,107.78
  5. Step 5: Solve for x
    x = 4,354,996,107.78/66,971.40
  6. Step 6: Final answer
    x = 65,027.70

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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.