Home / 100,642.14-138,883.33-55,320.21

Finding the Fourth Proportional to 100,642.14, 138,883.33 and 55,320.21

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Solution

The fourth proportional to 100,642.14, 138,883.33 and 55,320.21 is: 76,340.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,642.14 : 138,883.33 = 55,320.21 : x
  2. Step 2: Convert to fraction form
    100,642.14/138,883.33 = 55,320.21/x
  3. Step 3: Cross multiply
    100,642.14x = 138,883.33 × 55,320.21
  4. Step 4: Simplify right side
    100,642.14x = 7,683,054,010.08
  5. Step 5: Solve for x
    x = 7,683,054,010.08/100,642.14
  6. Step 6: Final answer
    x = 76,340.33

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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.