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Finding the Fourth Proportional to 100,263.69, 138,363.89 and 55,551.69

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Solution

The fourth proportional to 100,263.69, 138,363.89 and 55,551.69 is: 76,661.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,263.69 : 138,363.89 = 55,551.69 : x
  2. Step 2: Convert to fraction form
    100,263.69/138,363.89 = 55,551.69/x
  3. Step 3: Cross multiply
    100,263.69x = 138,363.89 × 55,551.69
  4. Step 4: Simplify right side
    100,263.69x = 7,686,347,924.47
  5. Step 5: Solve for x
    x = 7,686,347,924.47/100,263.69
  6. Step 6: Final answer
    x = 76,661.33

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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.