Home / 78,785.33-118,122.63-28,858.95

Finding the Fourth Proportional to 78,785.33, 118,122.63 and 28,858.95

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Solution

The fourth proportional to 78,785.33, 118,122.63 and 28,858.95 is: 43,268.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,785.33 : 118,122.63 = 28,858.95 : x
  2. Step 2: Convert to fraction form
    78,785.33/118,122.63 = 28,858.95/x
  3. Step 3: Cross multiply
    78,785.33x = 118,122.63 × 28,858.95
  4. Step 4: Simplify right side
    78,785.33x = 3,408,895,073.04
  5. Step 5: Solve for x
    x = 3,408,895,073.04/78,785.33
  6. Step 6: Final answer
    x = 43,268.15

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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.