Home / 112,884.20-155,709.70-72,650.60

Finding the Fourth Proportional to 112,884.20, 155,709.70 and 72,650.60

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Solution

The fourth proportional to 112,884.20, 155,709.70 and 72,650.60 is: 100,212.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,884.20 : 155,709.70 = 72,650.60 : x
  2. Step 2: Convert to fraction form
    112,884.20/155,709.70 = 72,650.60/x
  3. Step 3: Cross multiply
    112,884.20x = 155,709.70 × 72,650.60
  4. Step 4: Simplify right side
    112,884.20x = 11,312,403,130.82
  5. Step 5: Solve for x
    x = 11,312,403,130.82/112,884.20
  6. Step 6: Final answer
    x = 100,212.46

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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.