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Finding the Fourth Proportional to 54,688.80, 81,968.40 and 40,821.60

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Solution

The fourth proportional to 54,688.80, 81,968.40 and 40,821.60 is: 61,184.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,688.80 : 81,968.40 = 40,821.60 : x
  2. Step 2: Convert to fraction form
    54,688.80/81,968.40 = 40,821.60/x
  3. Step 3: Cross multiply
    54,688.80x = 81,968.40 × 40,821.60
  4. Step 4: Simplify right side
    54,688.80x = 3,346,081,237.44
  5. Step 5: Solve for x
    x = 3,346,081,237.44/54,688.80
  6. Step 6: Final answer
    x = 61,184.03

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1.5x scale

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.