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Finding the Fourth Proportional to 55,870.81, 83,858.88 and 20,366.45

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Solution

The fourth proportional to 55,870.81, 83,858.88 and 20,366.45 is: 30,568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,870.81 : 83,858.88 = 20,366.45 : x
  2. Step 2: Convert to fraction form
    55,870.81/83,858.88 = 20,366.45/x
  3. Step 3: Cross multiply
    55,870.81x = 83,858.88 × 20,366.45
  4. Step 4: Simplify right side
    55,870.81x = 1,707,907,448.48
  5. Step 5: Solve for x
    x = 1,707,907,448.48/55,870.81
  6. Step 6: Final answer
    x = 30,568.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.