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Finding the Fourth Proportional to 218,381.12, 301,365.80 and 122,887.90

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Solution

The fourth proportional to 218,381.12, 301,365.80 and 122,887.90 is: 169,585.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,381.12 : 301,365.80 = 122,887.90 : x
  2. Step 2: Convert to fraction form
    218,381.12/301,365.80 = 122,887.90/x
  3. Step 3: Cross multiply
    218,381.12x = 301,365.80 × 122,887.90
  4. Step 4: Simplify right side
    218,381.12x = 37,034,208,786.99
  5. Step 5: Solve for x
    x = 37,034,208,786.99/218,381.12
  6. Step 6: Final answer
    x = 169,585.22

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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.