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Finding the Fourth Proportional to 57,873.65, 86,720.67 and 40,138.89

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Solution

The fourth proportional to 57,873.65, 86,720.67 and 40,138.89 is: 60,146.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,873.65 : 86,720.67 = 40,138.89 : x
  2. Step 2: Convert to fraction form
    57,873.65/86,720.67 = 40,138.89/x
  3. Step 3: Cross multiply
    57,873.65x = 86,720.67 × 40,138.89
  4. Step 4: Simplify right side
    57,873.65x = 3,480,871,433.86
  5. Step 5: Solve for x
    x = 3,480,871,433.86/57,873.65
  6. Step 6: Final answer
    x = 60,146.05

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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.