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Finding the Fourth Proportional to 100,262.81, 138,362.68 and 55,550.81

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Solution

The fourth proportional to 100,262.81, 138,362.68 and 55,550.81 is: 76,660.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,262.81 : 138,362.68 = 55,550.81 : x
  2. Step 2: Convert to fraction form
    100,262.81/138,362.68 = 55,550.81/x
  3. Step 3: Cross multiply
    100,262.81x = 138,362.68 × 55,550.81
  4. Step 4: Simplify right side
    100,262.81x = 7,686,159,363.12
  5. Step 5: Solve for x
    x = 7,686,159,363.12/100,262.81
  6. Step 6: Final answer
    x = 76,660.12

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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.