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Finding the Fourth Proportional to 108,612.80, 162,724.80 and 93,060.80

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Solution

The fourth proportional to 108,612.80, 162,724.80 and 93,060.80 is: 139,424.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,612.80 : 162,724.80 = 93,060.80 : x
  2. Step 2: Convert to fraction form
    108,612.80/162,724.80 = 93,060.80/x
  3. Step 3: Cross multiply
    108,612.80x = 162,724.80 × 93,060.80
  4. Step 4: Simplify right side
    108,612.80x = 15,143,300,067.84
  5. Step 5: Solve for x
    x = 15,143,300,067.84/108,612.80
  6. Step 6: Final answer
    x = 139,424.64

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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.