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Finding the Fourth Proportional to 144,720.80, 217,081.20 and 127,224.80

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Solution

The fourth proportional to 144,720.80, 217,081.20 and 127,224.80 is: 190,837.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,720.80 : 217,081.20 = 127,224.80 : x
  2. Step 2: Convert to fraction form
    144,720.80/217,081.20 = 127,224.80/x
  3. Step 3: Cross multiply
    144,720.80x = 217,081.20 × 127,224.80
  4. Step 4: Simplify right side
    144,720.80x = 27,618,112,253.76
  5. Step 5: Solve for x
    x = 27,618,112,253.76/144,720.80
  6. Step 6: Final answer
    x = 190,837.20

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1.5x scale

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.