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Finding the Fourth Proportional to 78,967.53, 117,435.69 and 76,475.88

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Solution

The fourth proportional to 78,967.53, 117,435.69 and 76,475.88 is: 113,730.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,967.53 : 117,435.69 = 76,475.88 : x
  2. Step 2: Convert to fraction form
    78,967.53/117,435.69 = 76,475.88/x
  3. Step 3: Cross multiply
    78,967.53x = 117,435.69 × 76,475.88
  4. Step 4: Simplify right side
    78,967.53x = 8,980,997,736.16
  5. Step 5: Solve for x
    x = 8,980,997,736.16/78,967.53
  6. Step 6: Final answer
    x = 113,730.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.