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Finding the Fourth Proportional to 100,873.94, 139,201 and 55,555.84

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Solution

The fourth proportional to 100,873.94, 139,201 and 55,555.84 is: 76,664.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,873.94 : 139,201 = 55,555.84 : x
  2. Step 2: Convert to fraction form
    100,873.94/139,201 = 55,555.84/x
  3. Step 3: Cross multiply
    100,873.94x = 139,201 × 55,555.84
  4. Step 4: Simplify right side
    100,873.94x = 7,733,428,483.84
  5. Step 5: Solve for x
    x = 7,733,428,483.84/100,873.94
  6. Step 6: Final answer
    x = 76,664.28

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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.