Home / 81,650.12-122,365.02-61,866.68

Finding the Fourth Proportional to 81,650.12, 122,365.02 and 61,866.68

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Solution

The fourth proportional to 81,650.12, 122,365.02 and 61,866.68 is: 92,716.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,650.12 : 122,365.02 = 61,866.68 : x
  2. Step 2: Convert to fraction form
    81,650.12/122,365.02 = 61,866.68/x
  3. Step 3: Cross multiply
    81,650.12x = 122,365.02 × 61,866.68
  4. Step 4: Simplify right side
    81,650.12x = 7,570,317,535.53
  5. Step 5: Solve for x
    x = 7,570,317,535.53/81,650.12
  6. Step 6: Final answer
    x = 92,716.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.