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Finding the Fourth Proportional to 51,491.40, 77,139.90 and 26,446.20

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Solution

The fourth proportional to 51,491.40, 77,139.90 and 26,446.20 is: 39,619.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,491.40 : 77,139.90 = 26,446.20 : x
  2. Step 2: Convert to fraction form
    51,491.40/77,139.90 = 26,446.20/x
  3. Step 3: Cross multiply
    51,491.40x = 77,139.90 × 26,446.20
  4. Step 4: Simplify right side
    51,491.40x = 2,040,057,223.38
  5. Step 5: Solve for x
    x = 2,040,057,223.38/51,491.40
  6. Step 6: Final answer
    x = 39,619.38

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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.