Home / 85,836.10-128,766.30-26,665.60

Finding the Fourth Proportional to 85,836.10, 128,766.30 and 26,665.60

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Solution

The fourth proportional to 85,836.10, 128,766.30 and 26,665.60 is: 40,002.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,836.10 : 128,766.30 = 26,665.60 : x
  2. Step 2: Convert to fraction form
    85,836.10/128,766.30 = 26,665.60/x
  3. Step 3: Cross multiply
    85,836.10x = 128,766.30 × 26,665.60
  4. Step 4: Simplify right side
    85,836.10x = 3,433,630,649.28
  5. Step 5: Solve for x
    x = 3,433,630,649.28/85,836.10
  6. Step 6: Final answer
    x = 40,002.17

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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.