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Finding the Fourth Proportional to 66,472.25, 91,715.31 and 40,624.21

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Solution

The fourth proportional to 66,472.25, 91,715.31 and 40,624.21 is: 56,051.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,472.25 : 91,715.31 = 40,624.21 : x
  2. Step 2: Convert to fraction form
    66,472.25/91,715.31 = 40,624.21/x
  3. Step 3: Cross multiply
    66,472.25x = 91,715.31 × 40,624.21
  4. Step 4: Simplify right side
    66,472.25x = 3,725,861,581.25
  5. Step 5: Solve for x
    x = 3,725,861,581.25/66,472.25
  6. Step 6: Final answer
    x = 56,051.38

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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.