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Finding the Fourth Proportional to 100,962.58, 139,329.31 and 55,642.22

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Solution

The fourth proportional to 100,962.58, 139,329.31 and 55,642.22 is: 76,786.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,962.58 : 139,329.31 = 55,642.22 : x
  2. Step 2: Convert to fraction form
    100,962.58/139,329.31 = 55,642.22/x
  3. Step 3: Cross multiply
    100,962.58x = 139,329.31 × 55,642.22
  4. Step 4: Simplify right side
    100,962.58x = 7,752,592,119.47
  5. Step 5: Solve for x
    x = 7,752,592,119.47/100,962.58
  6. Step 6: Final answer
    x = 76,786.79

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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.