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Finding the Fourth Proportional to 72,491.82, 100,114.75 and 49,889.17

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Solution

The fourth proportional to 72,491.82, 100,114.75 and 49,889.17 is: 68,899.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,491.82 : 100,114.75 = 49,889.17 : x
  2. Step 2: Convert to fraction form
    72,491.82/100,114.75 = 49,889.17/x
  3. Step 3: Cross multiply
    72,491.82x = 100,114.75 × 49,889.17
  4. Step 4: Simplify right side
    72,491.82x = 4,994,641,782.26
  5. Step 5: Solve for x
    x = 4,994,641,782.26/72,491.82
  6. Step 6: Final answer
    x = 68,899.38

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Double scale
Find fourth proportional to 72,492.82, 100,116.13 and 49,890.17
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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.