Home / 100,193.76-138,266.09-57,172.13

Finding the Fourth Proportional to 100,193.76, 138,266.09 and 57,172.13

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Solution

The fourth proportional to 100,193.76, 138,266.09 and 57,172.13 is: 78,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,193.76 : 138,266.09 = 57,172.13 : x
  2. Step 2: Convert to fraction form
    100,193.76/138,266.09 = 57,172.13/x
  3. Step 3: Cross multiply
    100,193.76x = 138,266.09 × 57,172.13
  4. Step 4: Simplify right side
    100,193.76x = 7,904,966,627.77
  5. Step 5: Solve for x
    x = 7,904,966,627.77/100,193.76
  6. Step 6: Final answer
    x = 78,896.80

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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.