Home / 78,728.37-118,133.55-34,359.60

Finding the Fourth Proportional to 78,728.37, 118,133.55 and 34,359.60

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Solution

The fourth proportional to 78,728.37, 118,133.55 and 34,359.60 is: 51,557.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,728.37 : 118,133.55 = 34,359.60 : x
  2. Step 2: Convert to fraction form
    78,728.37/118,133.55 = 34,359.60/x
  3. Step 3: Cross multiply
    78,728.37x = 118,133.55 × 34,359.60
  4. Step 4: Simplify right side
    78,728.37x = 4,059,021,524.58
  5. Step 5: Solve for x
    x = 4,059,021,524.58/78,728.37
  6. Step 6: Final answer
    x = 51,557.29

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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.