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Finding the Fourth Proportional to 305,746.80, 458,620.20 and 81,106.80

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Solution

The fourth proportional to 305,746.80, 458,620.20 and 81,106.80 is: 121,660.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,746.80 : 458,620.20 = 81,106.80 : x
  2. Step 2: Convert to fraction form
    305,746.80/458,620.20 = 81,106.80/x
  3. Step 3: Cross multiply
    305,746.80x = 458,620.20 × 81,106.80
  4. Step 4: Simplify right side
    305,746.80x = 37,197,216,837.36
  5. Step 5: Solve for x
    x = 37,197,216,837.36/305,746.80
  6. Step 6: Final answer
    x = 121,660.20

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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.