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Finding the Fourth Proportional to 101,099.55, 139,516.05 and 55,779.45

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Solution

The fourth proportional to 101,099.55, 139,516.05 and 55,779.45 is: 76,974.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,099.55 : 139,516.05 = 55,779.45 : x
  2. Step 2: Convert to fraction form
    101,099.55/139,516.05 = 55,779.45/x
  3. Step 3: Cross multiply
    101,099.55x = 139,516.05 × 55,779.45
  4. Step 4: Simplify right side
    101,099.55x = 7,782,128,535.17
  5. Step 5: Solve for x
    x = 7,782,128,535.17/101,099.55
  6. Step 6: Final answer
    x = 76,974.91

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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.