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Finding the Fourth Proportional to 54,187.60, 81,281.40 and 19,128.40

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Solution

The fourth proportional to 54,187.60, 81,281.40 and 19,128.40 is: 28,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,187.60 : 81,281.40 = 19,128.40 : x
  2. Step 2: Convert to fraction form
    54,187.60/81,281.40 = 19,128.40/x
  3. Step 3: Cross multiply
    54,187.60x = 81,281.40 × 19,128.40
  4. Step 4: Simplify right side
    54,187.60x = 1,554,783,131.76
  5. Step 5: Solve for x
    x = 1,554,783,131.76/54,187.60
  6. Step 6: Final answer
    x = 28,692.60

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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.