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Finding the Fourth Proportional to 81,491.88, 112,448.88 and 45,674.24

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Solution

The fourth proportional to 81,491.88, 112,448.88 and 45,674.24 is: 63,024.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,491.88 : 112,448.88 = 45,674.24 : x
  2. Step 2: Convert to fraction form
    81,491.88/112,448.88 = 45,674.24/x
  3. Step 3: Cross multiply
    81,491.88x = 112,448.88 × 45,674.24
  4. Step 4: Simplify right side
    81,491.88x = 5,136,017,132.85
  5. Step 5: Solve for x
    x = 5,136,017,132.85/81,491.88
  6. Step 6: Final answer
    x = 63,024.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.