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Finding the Fourth Proportional to 100,550.84, 138,780.42 and 58,103.60

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Solution

The fourth proportional to 100,550.84, 138,780.42 and 58,103.60 is: 80,194.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,550.84 : 138,780.42 = 58,103.60 : x
  2. Step 2: Convert to fraction form
    100,550.84/138,780.42 = 58,103.60/x
  3. Step 3: Cross multiply
    100,550.84x = 138,780.42 × 58,103.60
  4. Step 4: Simplify right side
    100,550.84x = 8,063,642,011.51
  5. Step 5: Solve for x
    x = 8,063,642,011.51/100,550.84
  6. Step 6: Final answer
    x = 80,194.68

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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.