Home / 85,890.28-128,816.70-43,725.64

Finding the Fourth Proportional to 85,890.28, 128,816.70 and 43,725.64

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Solution

The fourth proportional to 85,890.28, 128,816.70 and 43,725.64 is: 65,578.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890.28 : 128,816.70 = 43,725.64 : x
  2. Step 2: Convert to fraction form
    85,890.28/128,816.70 = 43,725.64/x
  3. Step 3: Cross multiply
    85,890.28x = 128,816.70 × 43,725.64
  4. Step 4: Simplify right side
    85,890.28x = 5,632,592,650.19
  5. Step 5: Solve for x
    x = 5,632,592,650.19/85,890.28
  6. Step 6: Final answer
    x = 65,578.93

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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.