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Finding the Fourth Proportional to 218,280.30, 301,244.31 and 122,781.30

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Solution

The fourth proportional to 218,280.30, 301,244.31 and 122,781.30 is: 169,448.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,280.30 : 301,244.31 = 122,781.30 : x
  2. Step 2: Convert to fraction form
    218,280.30/301,244.31 = 122,781.30/x
  3. Step 3: Cross multiply
    218,280.30x = 301,244.31 × 122,781.30
  4. Step 4: Simplify right side
    218,280.30x = 36,987,167,999.40
  5. Step 5: Solve for x
    x = 36,987,167,999.40/218,280.30
  6. Step 6: Final answer
    x = 169,448.04

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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.