Home / 78,938.19-118,871.87-56,906.60

Finding the Fourth Proportional to 78,938.19, 118,871.87 and 56,906.60

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Solution

The fourth proportional to 78,938.19, 118,871.87 and 56,906.60 is: 85,694.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.19 : 118,871.87 = 56,906.60 : x
  2. Step 2: Convert to fraction form
    78,938.19/118,871.87 = 56,906.60/x
  3. Step 3: Cross multiply
    78,938.19x = 118,871.87 × 56,906.60
  4. Step 4: Simplify right side
    78,938.19x = 6,764,593,078.45
  5. Step 5: Solve for x
    x = 6,764,593,078.45/78,938.19
  6. Step 6: Final answer
    x = 85,694.81

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.