Home / 54,005.40-81,008.10-40,699.80

Finding the Fourth Proportional to 54,005.40, 81,008.10 and 40,699.80

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Solution

The fourth proportional to 54,005.40, 81,008.10 and 40,699.80 is: 61,049.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,005.40 : 81,008.10 = 40,699.80 : x
  2. Step 2: Convert to fraction form
    54,005.40/81,008.10 = 40,699.80/x
  3. Step 3: Cross multiply
    54,005.40x = 81,008.10 × 40,699.80
  4. Step 4: Simplify right side
    54,005.40x = 3,297,013,468.38
  5. Step 5: Solve for x
    x = 3,297,013,468.38/54,005.40
  6. Step 6: Final answer
    x = 61,049.70

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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.