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Finding the Fourth Proportional to 78,352.63, 117,575.64 and 28,436.62

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Solution

The fourth proportional to 78,352.63, 117,575.64 and 28,436.62 is: 42,671.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,352.63 : 117,575.64 = 28,436.62 : x
  2. Step 2: Convert to fraction form
    78,352.63/117,575.64 = 28,436.62/x
  3. Step 3: Cross multiply
    78,352.63x = 117,575.64 × 28,436.62
  4. Step 4: Simplify right side
    78,352.63x = 3,343,453,795.94
  5. Step 5: Solve for x
    x = 3,343,453,795.94/78,352.63
  6. Step 6: Final answer
    x = 42,671.88

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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.