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Finding the Fourth Proportional to 85,846.60, 128,782.05 and 26,676.10

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Solution

The fourth proportional to 85,846.60, 128,782.05 and 26,676.10 is: 40,017.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,846.60 : 128,782.05 = 26,676.10 : x
  2. Step 2: Convert to fraction form
    85,846.60/128,782.05 = 26,676.10/x
  3. Step 3: Cross multiply
    85,846.60x = 128,782.05 × 26,676.10
  4. Step 4: Simplify right side
    85,846.60x = 3,435,402,844.01
  5. Step 5: Solve for x
    x = 3,435,402,844.01/85,846.60
  6. Step 6: Final answer
    x = 40,017.93

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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.