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Finding the Fourth Proportional to 71,491.98, 98,670.74 and 39,671.13

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Solution

The fourth proportional to 71,491.98, 98,670.74 and 39,671.13 is: 54,752.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,491.98 : 98,670.74 = 39,671.13 : x
  2. Step 2: Convert to fraction form
    71,491.98/98,670.74 = 39,671.13/x
  3. Step 3: Cross multiply
    71,491.98x = 98,670.74 × 39,671.13
  4. Step 4: Simplify right side
    71,491.98x = 3,914,379,555.38
  5. Step 5: Solve for x
    x = 3,914,379,555.38/71,491.98
  6. Step 6: Final answer
    x = 54,752.71

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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.