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Finding the Fourth Proportional to 291,676, 437,515.82 and 81,315.76

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Solution

The fourth proportional to 291,676, 437,515.82 and 81,315.76 is: 121,974.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,676 : 437,515.82 = 81,315.76 : x
  2. Step 2: Convert to fraction form
    291,676/437,515.82 = 81,315.76/x
  3. Step 3: Cross multiply
    291,676x = 437,515.82 × 81,315.76
  4. Step 4: Simplify right side
    291,676x = 35,576,931,415.32
  5. Step 5: Solve for x
    x = 35,576,931,415.32/291,676
  6. Step 6: Final answer
    x = 121,974.15

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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.