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Finding the Fourth Proportional to 104,678, 156,803.16 and 87,091.28

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Solution

The fourth proportional to 104,678, 156,803.16 and 87,091.28 is: 130,459.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,678 : 156,803.16 = 87,091.28 : x
  2. Step 2: Convert to fraction form
    104,678/156,803.16 = 87,091.28/x
  3. Step 3: Cross multiply
    104,678x = 156,803.16 × 87,091.28
  4. Step 4: Simplify right side
    104,678x = 13,656,187,912.44
  5. Step 5: Solve for x
    x = 13,656,187,912.44/104,678
  6. Step 6: Final answer
    x = 130,459.01

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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.