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Finding the Fourth Proportional to 45,378.60, 68,059.80 and 28,708.80

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Solution

The fourth proportional to 45,378.60, 68,059.80 and 28,708.80 is: 43,058.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,378.60 : 68,059.80 = 28,708.80 : x
  2. Step 2: Convert to fraction form
    45,378.60/68,059.80 = 28,708.80/x
  3. Step 3: Cross multiply
    45,378.60x = 68,059.80 × 28,708.80
  4. Step 4: Simplify right side
    45,378.60x = 1,953,915,186.24
  5. Step 5: Solve for x
    x = 1,953,915,186.24/45,378.60
  6. Step 6: Final answer
    x = 43,058.08

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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.