Home / 138,561.50-190,953.59-100,256.19

Finding the Fourth Proportional to 138,561.50, 190,953.59 and 100,256.19

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Solution

The fourth proportional to 138,561.50, 190,953.59 and 100,256.19 is: 138,164.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,561.50 : 190,953.59 = 100,256.19 : x
  2. Step 2: Convert to fraction form
    138,561.50/190,953.59 = 100,256.19/x
  3. Step 3: Cross multiply
    138,561.50x = 190,953.59 × 100,256.19
  4. Step 4: Simplify right side
    138,561.50x = 19,144,279,400.22
  5. Step 5: Solve for x
    x = 19,144,279,400.22/138,561.50
  6. Step 6: Final answer
    x = 138,164.49

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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.