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Finding the Fourth Proportional to 74,763, 112,146.66 and 19,359

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Solution

The fourth proportional to 74,763, 112,146.66 and 19,359 is: 29,039.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,763 : 112,146.66 = 19,359 : x
  2. Step 2: Convert to fraction form
    74,763/112,146.66 = 19,359/x
  3. Step 3: Cross multiply
    74,763x = 112,146.66 × 19,359
  4. Step 4: Simplify right side
    74,763x = 2,171,047,190.94
  5. Step 5: Solve for x
    x = 2,171,047,190.94/74,763
  6. Step 6: Final answer
    x = 29,039.06

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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.