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Finding the Fourth Proportional to 53,903.20, 80,854.80 and 18,839.20

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Solution

The fourth proportional to 53,903.20, 80,854.80 and 18,839.20 is: 28,258.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,903.20 : 80,854.80 = 18,839.20 : x
  2. Step 2: Convert to fraction form
    53,903.20/80,854.80 = 18,839.20/x
  3. Step 3: Cross multiply
    53,903.20x = 80,854.80 × 18,839.20
  4. Step 4: Simplify right side
    53,903.20x = 1,523,239,748.16
  5. Step 5: Solve for x
    x = 1,523,239,748.16/53,903.20
  6. Step 6: Final answer
    x = 28,258.80

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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.