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Finding the Fourth Proportional to 66,832.60, 100,139.52 and 40,457.40

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Solution

The fourth proportional to 66,832.60, 100,139.52 and 40,457.40 is: 60,619.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,832.60 : 100,139.52 = 40,457.40 : x
  2. Step 2: Convert to fraction form
    66,832.60/100,139.52 = 40,457.40/x
  3. Step 3: Cross multiply
    66,832.60x = 100,139.52 × 40,457.40
  4. Step 4: Simplify right side
    66,832.60x = 4,051,384,616.45
  5. Step 5: Solve for x
    x = 4,051,384,616.45/66,832.60
  6. Step 6: Final answer
    x = 60,619.89

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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.