Home / 78,803.28-118,205.33-19,638.95

Finding the Fourth Proportional to 78,803.28, 118,205.33 and 19,638.95

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Solution

The fourth proportional to 78,803.28, 118,205.33 and 19,638.95 is: 29,458.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,803.28 : 118,205.33 = 19,638.95 : x
  2. Step 2: Convert to fraction form
    78,803.28/118,205.33 = 19,638.95/x
  3. Step 3: Cross multiply
    78,803.28x = 118,205.33 × 19,638.95
  4. Step 4: Simplify right side
    78,803.28x = 2,321,427,876.38
  5. Step 5: Solve for x
    x = 2,321,427,876.38/78,803.28
  6. Step 6: Final answer
    x = 29,458.52

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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.