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Finding the Fourth Proportional to 54,281.59, 81,428.40 and 18,738.88

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Solution

The fourth proportional to 54,281.59, 81,428.40 and 18,738.88 is: 28,110.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,281.59 : 81,428.40 = 18,738.88 : x
  2. Step 2: Convert to fraction form
    54,281.59/81,428.40 = 18,738.88/x
  3. Step 3: Cross multiply
    54,281.59x = 81,428.40 × 18,738.88
  4. Step 4: Simplify right side
    54,281.59x = 1,525,877,016.19
  5. Step 5: Solve for x
    x = 1,525,877,016.19/54,281.59
  6. Step 6: Final answer
    x = 28,110.40

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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.