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Finding the Fourth Proportional to 77,491.72, 116,288.70 and 28,243.72

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Solution

The fourth proportional to 77,491.72, 116,288.70 and 28,243.72 is: 42,384.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,491.72 : 116,288.70 = 28,243.72 : x
  2. Step 2: Convert to fraction form
    77,491.72/116,288.70 = 28,243.72/x
  3. Step 3: Cross multiply
    77,491.72x = 116,288.70 × 28,243.72
  4. Step 4: Simplify right side
    77,491.72x = 3,284,425,481.96
  5. Step 5: Solve for x
    x = 3,284,425,481.96/77,491.72
  6. Step 6: Final answer
    x = 42,384.21

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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.