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Finding the Fourth Proportional to 71,368.92, 107,053.38 and 18,774

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Solution

The fourth proportional to 71,368.92, 107,053.38 and 18,774 is: 28,161.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,368.92 : 107,053.38 = 18,774 : x
  2. Step 2: Convert to fraction form
    71,368.92/107,053.38 = 18,774/x
  3. Step 3: Cross multiply
    71,368.92x = 107,053.38 × 18,774
  4. Step 4: Simplify right side
    71,368.92x = 2,009,820,156.12
  5. Step 5: Solve for x
    x = 2,009,820,156.12/71,368.92
  6. Step 6: Final answer
    x = 28,161.00

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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.