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Finding the Fourth Proportional to 43,752.80, 65,629.20 and 28,978.40

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Solution

The fourth proportional to 43,752.80, 65,629.20 and 28,978.40 is: 43,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,752.80 : 65,629.20 = 28,978.40 : x
  2. Step 2: Convert to fraction form
    43,752.80/65,629.20 = 28,978.40/x
  3. Step 3: Cross multiply
    43,752.80x = 65,629.20 × 28,978.40
  4. Step 4: Simplify right side
    43,752.80x = 1,901,829,209.28
  5. Step 5: Solve for x
    x = 1,901,829,209.28/43,752.80
  6. Step 6: Final answer
    x = 43,467.60

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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.