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Finding the Fourth Proportional to 147,021.60, 220,240.80 and 84,619.20

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Solution

The fourth proportional to 147,021.60, 220,240.80 and 84,619.20 is: 126,760.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,021.60 : 220,240.80 = 84,619.20 : x
  2. Step 2: Convert to fraction form
    147,021.60/220,240.80 = 84,619.20/x
  3. Step 3: Cross multiply
    147,021.60x = 220,240.80 × 84,619.20
  4. Step 4: Simplify right side
    147,021.60x = 18,636,600,303.36
  5. Step 5: Solve for x
    x = 18,636,600,303.36/147,021.60
  6. Step 6: Final answer
    x = 126,760.97

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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.