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Finding the Fourth Proportional to 72,585.65, 100,165.60 and 40,755.89

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Solution

The fourth proportional to 72,585.65, 100,165.60 and 40,755.89 is: 56,241.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,585.65 : 100,165.60 = 40,755.89 : x
  2. Step 2: Convert to fraction form
    72,585.65/100,165.60 = 40,755.89/x
  3. Step 3: Cross multiply
    72,585.65x = 100,165.60 × 40,755.89
  4. Step 4: Simplify right side
    72,585.65x = 4,082,338,175.38
  5. Step 5: Solve for x
    x = 4,082,338,175.38/72,585.65
  6. Step 6: Final answer
    x = 56,241.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.