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Finding the Fourth Proportional to 101,008.92, 139,389.74 and 55,685.85

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Solution

The fourth proportional to 101,008.92, 139,389.74 and 55,685.85 is: 76,845.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,008.92 : 139,389.74 = 55,685.85 : x
  2. Step 2: Convert to fraction form
    101,008.92/139,389.74 = 55,685.85/x
  3. Step 3: Cross multiply
    101,008.92x = 139,389.74 × 55,685.85
  4. Step 4: Simplify right side
    101,008.92x = 7,762,036,153.18
  5. Step 5: Solve for x
    x = 7,762,036,153.18/101,008.92
  6. Step 6: Final answer
    x = 76,845.06

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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.