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Finding the Fourth Proportional to 78,339.44, 117,392.48 and 43,289.12

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Solution

The fourth proportional to 78,339.44, 117,392.48 and 43,289.12 is: 64,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,339.44 : 117,392.48 = 43,289.12 : x
  2. Step 2: Convert to fraction form
    78,339.44/117,392.48 = 43,289.12/x
  3. Step 3: Cross multiply
    78,339.44x = 117,392.48 × 43,289.12
  4. Step 4: Simplify right side
    78,339.44x = 5,081,817,153.82
  5. Step 5: Solve for x
    x = 5,081,817,153.82/78,339.44
  6. Step 6: Final answer
    x = 64,869.20

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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.