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Finding the Fourth Proportional to 55,805.60, 83,708.40 and 18,869.60

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Solution

The fourth proportional to 55,805.60, 83,708.40 and 18,869.60 is: 28,304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,805.60 : 83,708.40 = 18,869.60 : x
  2. Step 2: Convert to fraction form
    55,805.60/83,708.40 = 18,869.60/x
  3. Step 3: Cross multiply
    55,805.60x = 83,708.40 × 18,869.60
  4. Step 4: Simplify right side
    55,805.60x = 1,579,544,024.64
  5. Step 5: Solve for x
    x = 1,579,544,024.64/55,805.60
  6. Step 6: Final answer
    x = 28,304.40

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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.