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Finding the Fourth Proportional to 45,412.60, 68,110.80 and 28,742.80

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Solution

The fourth proportional to 45,412.60, 68,110.80 and 28,742.80 is: 43,109.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,412.60 : 68,110.80 = 28,742.80 : x
  2. Step 2: Convert to fraction form
    45,412.60/68,110.80 = 28,742.80/x
  3. Step 3: Cross multiply
    45,412.60x = 68,110.80 × 28,742.80
  4. Step 4: Simplify right side
    45,412.60x = 1,957,695,102.24
  5. Step 5: Solve for x
    x = 1,957,695,102.24/45,412.60
  6. Step 6: Final answer
    x = 43,109.07

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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.