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Finding the Fourth Proportional to 53,955.40, 80,860.20 and 36,135.40

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Solution

The fourth proportional to 53,955.40, 80,860.20 and 36,135.40 is: 54,154.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,955.40 : 80,860.20 = 36,135.40 : x
  2. Step 2: Convert to fraction form
    53,955.40/80,860.20 = 36,135.40/x
  3. Step 3: Cross multiply
    53,955.40x = 80,860.20 × 36,135.40
  4. Step 4: Simplify right side
    53,955.40x = 2,921,915,671.08
  5. Step 5: Solve for x
    x = 2,921,915,671.08/53,955.40
  6. Step 6: Final answer
    x = 54,154.28

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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.