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Finding the Fourth Proportional to 77,018, 106,285.16 and 41,690

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Solution

The fourth proportional to 77,018, 106,285.16 and 41,690 is: 57,532.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,018 : 106,285.16 = 41,690 : x
  2. Step 2: Convert to fraction form
    77,018/106,285.16 = 41,690/x
  3. Step 3: Cross multiply
    77,018x = 106,285.16 × 41,690
  4. Step 4: Simplify right side
    77,018x = 4,431,028,320.40
  5. Step 5: Solve for x
    x = 4,431,028,320.40/77,018
  6. Step 6: Final answer
    x = 57,532.37

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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.