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Finding the Fourth Proportional to 78,752.48, 118,094.06 and 28,819.60

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Solution

The fourth proportional to 78,752.48, 118,094.06 and 28,819.60 is: 43,216.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,752.48 : 118,094.06 = 28,819.60 : x
  2. Step 2: Convert to fraction form
    78,752.48/118,094.06 = 28,819.60/x
  3. Step 3: Cross multiply
    78,752.48x = 118,094.06 × 28,819.60
  4. Step 4: Simplify right side
    78,752.48x = 3,403,423,571.58
  5. Step 5: Solve for x
    x = 3,403,423,571.58/78,752.48
  6. Step 6: Final answer
    x = 43,216.72

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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.