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Finding the Fourth Proportional to 144,483.20, 216,724.80 and 126,987.20

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Solution

The fourth proportional to 144,483.20, 216,724.80 and 126,987.20 is: 190,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,483.20 : 216,724.80 = 126,987.20 : x
  2. Step 2: Convert to fraction form
    144,483.20/216,724.80 = 126,987.20/x
  3. Step 3: Cross multiply
    144,483.20x = 216,724.80 × 126,987.20
  4. Step 4: Simplify right side
    144,483.20x = 27,521,275,522.56
  5. Step 5: Solve for x
    x = 27,521,275,522.56/144,483.20
  6. Step 6: Final answer
    x = 190,480.80

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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.