Home / 218,781.50-301,945.96-128,172.04

Finding the Fourth Proportional to 218,781.50, 301,945.96 and 128,172.04

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Solution

The fourth proportional to 218,781.50, 301,945.96 and 128,172.04 is: 176,893.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,781.50 : 301,945.96 = 128,172.04 : x
  2. Step 2: Convert to fraction form
    218,781.50/301,945.96 = 128,172.04/x
  3. Step 3: Cross multiply
    218,781.50x = 301,945.96 × 128,172.04
  4. Step 4: Simplify right side
    218,781.50x = 38,701,029,662.96
  5. Step 5: Solve for x
    x = 38,701,029,662.96/218,781.50
  6. Step 6: Final answer
    x = 176,893.52

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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.