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Finding the Fourth Proportional to 218,313.78, 301,271.85 and 122,821.08

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Solution

The fourth proportional to 218,313.78, 301,271.85 and 122,821.08 is: 169,492.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,313.78 : 301,271.85 = 122,821.08 : x
  2. Step 2: Convert to fraction form
    218,313.78/301,271.85 = 122,821.08/x
  3. Step 3: Cross multiply
    218,313.78x = 301,271.85 × 122,821.08
  4. Step 4: Simplify right side
    218,313.78x = 37,002,533,990.60
  5. Step 5: Solve for x
    x = 37,002,533,990.60/218,313.78
  6. Step 6: Final answer
    x = 169,492.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.