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Finding the Fourth Proportional to 74,881.16, 112,321.42 and 19,477

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Solution

The fourth proportional to 74,881.16, 112,321.42 and 19,477 is: 29,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,881.16 : 112,321.42 = 19,477 : x
  2. Step 2: Convert to fraction form
    74,881.16/112,321.42 = 19,477/x
  3. Step 3: Cross multiply
    74,881.16x = 112,321.42 × 19,477
  4. Step 4: Simplify right side
    74,881.16x = 2,187,684,297.34
  5. Step 5: Solve for x
    x = 2,187,684,297.34/74,881.16
  6. Step 6: Final answer
    x = 29,215.42

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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.