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Finding the Fourth Proportional to 81,371.32, 112,285.98 and 45,553

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Solution

The fourth proportional to 81,371.32, 112,285.98 and 45,553 is: 62,859.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,371.32 : 112,285.98 = 45,553 : x
  2. Step 2: Convert to fraction form
    81,371.32/112,285.98 = 45,553/x
  3. Step 3: Cross multiply
    81,371.32x = 112,285.98 × 45,553
  4. Step 4: Simplify right side
    81,371.32x = 5,114,963,246.94
  5. Step 5: Solve for x
    x = 5,114,963,246.94/81,371.32
  6. Step 6: Final answer
    x = 62,859.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.