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Finding the Fourth Proportional to 100,889.75, 139,226.18 and 55,572.01

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Solution

The fourth proportional to 100,889.75, 139,226.18 and 55,572.01 is: 76,688.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,889.75 : 139,226.18 = 55,572.01 : x
  2. Step 2: Convert to fraction form
    100,889.75/139,226.18 = 55,572.01/x
  3. Step 3: Cross multiply
    100,889.75x = 139,226.18 × 55,572.01
  4. Step 4: Simplify right side
    100,889.75x = 7,737,078,041.30
  5. Step 5: Solve for x
    x = 7,737,078,041.30/100,889.75
  6. Step 6: Final answer
    x = 76,688.44

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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.