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Finding the Fourth Proportional to 51,812.94, 77,711.16 and 18,526.80

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Solution

The fourth proportional to 51,812.94, 77,711.16 and 18,526.80 is: 27,787.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,812.94 : 77,711.16 = 18,526.80 : x
  2. Step 2: Convert to fraction form
    51,812.94/77,711.16 = 18,526.80/x
  3. Step 3: Cross multiply
    51,812.94x = 77,711.16 × 18,526.80
  4. Step 4: Simplify right side
    51,812.94x = 1,439,739,119.09
  5. Step 5: Solve for x
    x = 1,439,739,119.09/51,812.94
  6. Step 6: Final answer
    x = 27,787.25

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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.