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Finding the Fourth Proportional to 60,371, 90,561.50 and 18,818

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Solution

The fourth proportional to 60,371, 90,561.50 and 18,818 is: 28,228.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,371 : 90,561.50 = 18,818 : x
  2. Step 2: Convert to fraction form
    60,371/90,561.50 = 18,818/x
  3. Step 3: Cross multiply
    60,371x = 90,561.50 × 18,818
  4. Step 4: Simplify right side
    60,371x = 1,704,186,307
  5. Step 5: Solve for x
    x = 1,704,186,307/60,371
  6. Step 6: Final answer
    x = 28,228.56

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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.