Home / 100,887.44-139,193.28-57,272.72

Finding the Fourth Proportional to 100,887.44, 139,193.28 and 57,272.72

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Solution

The fourth proportional to 100,887.44, 139,193.28 and 57,272.72 is: 79,018.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,887.44 : 139,193.28 = 57,272.72 : x
  2. Step 2: Convert to fraction form
    100,887.44/139,193.28 = 57,272.72/x
  3. Step 3: Cross multiply
    100,887.44x = 139,193.28 × 57,272.72
  4. Step 4: Simplify right side
    100,887.44x = 7,971,977,751.32
  5. Step 5: Solve for x
    x = 7,971,977,751.32/100,887.44
  6. Step 6: Final answer
    x = 79,018.54

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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.