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Finding the Fourth Proportional to 53,289.60, 79,793.60 and 42,710.40

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Solution

The fourth proportional to 53,289.60, 79,793.60 and 42,710.40 is: 63,952.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,289.60 : 79,793.60 = 42,710.40 : x
  2. Step 2: Convert to fraction form
    53,289.60/79,793.60 = 42,710.40/x
  3. Step 3: Cross multiply
    53,289.60x = 79,793.60 × 42,710.40
  4. Step 4: Simplify right side
    53,289.60x = 3,408,016,573.44
  5. Step 5: Solve for x
    x = 3,408,016,573.44/53,289.60
  6. Step 6: Final answer
    x = 63,952.75

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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.