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Finding the Fourth Proportional to 245,422.20, 368,133.30 and 127,129.80

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Solution

The fourth proportional to 245,422.20, 368,133.30 and 127,129.80 is: 190,694.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,422.20 : 368,133.30 = 127,129.80 : x
  2. Step 2: Convert to fraction form
    245,422.20/368,133.30 = 127,129.80/x
  3. Step 3: Cross multiply
    245,422.20x = 368,133.30 × 127,129.80
  4. Step 4: Simplify right side
    245,422.20x = 46,800,712,802.34
  5. Step 5: Solve for x
    x = 46,800,712,802.34/245,422.20
  6. Step 6: Final answer
    x = 190,694.70

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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.