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Finding the Fourth Proportional to 54,287.80, 81,431.70 and 35,625.40

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Solution

The fourth proportional to 54,287.80, 81,431.70 and 35,625.40 is: 53,438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,287.80 : 81,431.70 = 35,625.40 : x
  2. Step 2: Convert to fraction form
    54,287.80/81,431.70 = 35,625.40/x
  3. Step 3: Cross multiply
    54,287.80x = 81,431.70 × 35,625.40
  4. Step 4: Simplify right side
    54,287.80x = 2,901,036,885.18
  5. Step 5: Solve for x
    x = 2,901,036,885.18/54,287.80
  6. Step 6: Final answer
    x = 53,438.10

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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.