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Finding the Fourth Proportional to 43,273.20, 64,909.80 and 28,498.80

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Solution

The fourth proportional to 43,273.20, 64,909.80 and 28,498.80 is: 42,748.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,273.20 : 64,909.80 = 28,498.80 : x
  2. Step 2: Convert to fraction form
    43,273.20/64,909.80 = 28,498.80/x
  3. Step 3: Cross multiply
    43,273.20x = 64,909.80 × 28,498.80
  4. Step 4: Simplify right side
    43,273.20x = 1,849,851,408.24
  5. Step 5: Solve for x
    x = 1,849,851,408.24/43,273.20
  6. Step 6: Final answer
    x = 42,748.20

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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.