Home / 100,899.42-139,242.12-55,577.55

Finding the Fourth Proportional to 100,899.42, 139,242.12 and 55,577.55

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Solution

The fourth proportional to 100,899.42, 139,242.12 and 55,577.55 is: 76,697.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,899.42 : 139,242.12 = 55,577.55 : x
  2. Step 2: Convert to fraction form
    100,899.42/139,242.12 = 55,577.55/x
  3. Step 3: Cross multiply
    100,899.42x = 139,242.12 × 55,577.55
  4. Step 4: Simplify right side
    100,899.42x = 7,738,735,886.41
  5. Step 5: Solve for x
    x = 7,738,735,886.41/100,899.42
  6. Step 6: Final answer
    x = 76,697.53

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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.