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Finding the Fourth Proportional to 100,898.90, 139,241.42 and 55,577.04

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Solution

The fourth proportional to 100,898.90, 139,241.42 and 55,577.04 is: 76,696.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,898.90 : 139,241.42 = 55,577.04 : x
  2. Step 2: Convert to fraction form
    100,898.90/139,241.42 = 55,577.04/x
  3. Step 3: Cross multiply
    100,898.90x = 139,241.42 × 55,577.04
  4. Step 4: Simplify right side
    100,898.90x = 7,738,625,969.00
  5. Step 5: Solve for x
    x = 7,738,625,969.00/100,898.90
  6. Step 6: Final answer
    x = 76,696.83

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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.