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Finding the Fourth Proportional to 54,202.80, 81,401.40 and 39,428.40

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Solution

The fourth proportional to 54,202.80, 81,401.40 and 39,428.40 is: 59,213.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,202.80 : 81,401.40 = 39,428.40 : x
  2. Step 2: Convert to fraction form
    54,202.80/81,401.40 = 39,428.40/x
  3. Step 3: Cross multiply
    54,202.80x = 81,401.40 × 39,428.40
  4. Step 4: Simplify right side
    54,202.80x = 3,209,526,959.76
  5. Step 5: Solve for x
    x = 3,209,526,959.76/54,202.80
  6. Step 6: Final answer
    x = 59,213.31

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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.