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Finding the Fourth Proportional to 74,683, 112,024.70 and 19,279

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Solution

The fourth proportional to 74,683, 112,024.70 and 19,279 is: 28,918.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,683 : 112,024.70 = 19,279 : x
  2. Step 2: Convert to fraction form
    74,683/112,024.70 = 19,279/x
  3. Step 3: Cross multiply
    74,683x = 112,024.70 × 19,279
  4. Step 4: Simplify right side
    74,683x = 2,159,724,191.30
  5. Step 5: Solve for x
    x = 2,159,724,191.30/74,683
  6. Step 6: Final answer
    x = 28,918.55

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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.