Home / 118,868.10-178,135.69-85,431.30

Finding the Fourth Proportional to 118,868.10, 178,135.69 and 85,431.30

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Solution

The fourth proportional to 118,868.10, 178,135.69 and 85,431.30 is: 128,027.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,868.10 : 178,135.69 = 85,431.30 : x
  2. Step 2: Convert to fraction form
    118,868.10/178,135.69 = 85,431.30/x
  3. Step 3: Cross multiply
    118,868.10x = 178,135.69 × 85,431.30
  4. Step 4: Simplify right side
    118,868.10x = 15,218,363,573.10
  5. Step 5: Solve for x
    x = 15,218,363,573.10/118,868.10
  6. Step 6: Final answer
    x = 128,027.31

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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.