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Finding the Fourth Proportional to 57,880.50, 86,820.54 and 18,440.79

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Solution

The fourth proportional to 57,880.50, 86,820.54 and 18,440.79 is: 27,661.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,880.50 : 86,820.54 = 18,440.79 : x
  2. Step 2: Convert to fraction form
    57,880.50/86,820.54 = 18,440.79/x
  3. Step 3: Cross multiply
    57,880.50x = 86,820.54 × 18,440.79
  4. Step 4: Simplify right side
    57,880.50x = 1,601,039,345.83
  5. Step 5: Solve for x
    x = 1,601,039,345.83/57,880.50
  6. Step 6: Final answer
    x = 27,661.12

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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.