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Finding the Fourth Proportional to 102,647.80, 154,130.10 and 55,991.80

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Solution

The fourth proportional to 102,647.80, 154,130.10 and 55,991.80 is: 84,074.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,647.80 : 154,130.10 = 55,991.80 : x
  2. Step 2: Convert to fraction form
    102,647.80/154,130.10 = 55,991.80/x
  3. Step 3: Cross multiply
    102,647.80x = 154,130.10 × 55,991.80
  4. Step 4: Simplify right side
    102,647.80x = 8,630,021,733.18
  5. Step 5: Solve for x
    x = 8,630,021,733.18/102,647.80
  6. Step 6: Final answer
    x = 84,074.10

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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.