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Finding the Fourth Proportional to 103,240.80, 154,630.80 and 84,808.80

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Solution

The fourth proportional to 103,240.80, 154,630.80 and 84,808.80 is: 127,023.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,240.80 : 154,630.80 = 84,808.80 : x
  2. Step 2: Convert to fraction form
    103,240.80/154,630.80 = 84,808.80/x
  3. Step 3: Cross multiply
    103,240.80x = 154,630.80 × 84,808.80
  4. Step 4: Simplify right side
    103,240.80x = 13,114,052,591.04
  5. Step 5: Solve for x
    x = 13,114,052,591.04/103,240.80
  6. Step 6: Final answer
    x = 127,023.93

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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.