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Finding the Fourth Proportional to 112,986, 155,920.56 and 61,999.02

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Solution

The fourth proportional to 112,986, 155,920.56 and 61,999.02 is: 85,558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,986 : 155,920.56 = 61,999.02 : x
  2. Step 2: Convert to fraction form
    112,986/155,920.56 = 61,999.02/x
  3. Step 3: Cross multiply
    112,986x = 155,920.56 × 61,999.02
  4. Step 4: Simplify right side
    112,986x = 9,666,921,917.85
  5. Step 5: Solve for x
    x = 9,666,921,917.85/112,986
  6. Step 6: Final answer
    x = 85,558.58

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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.