Home / 100,440.53-138,573.60-57,389.13

Finding the Fourth Proportional to 100,440.53, 138,573.60 and 57,389.13

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Solution

The fourth proportional to 100,440.53, 138,573.60 and 57,389.13 is: 79,177.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,440.53 : 138,573.60 = 57,389.13 : x
  2. Step 2: Convert to fraction form
    100,440.53/138,573.60 = 57,389.13/x
  3. Step 3: Cross multiply
    100,440.53x = 138,573.60 × 57,389.13
  4. Step 4: Simplify right side
    100,440.53x = 7,952,618,344.97
  5. Step 5: Solve for x
    x = 7,952,618,344.97/100,440.53
  6. Step 6: Final answer
    x = 79,177.38

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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.