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Finding the Fourth Proportional to 78,832.74, 118,178.79 and 28,901.18

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Solution

The fourth proportional to 78,832.74, 118,178.79 and 28,901.18 is: 43,325.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,832.74 : 118,178.79 = 28,901.18 : x
  2. Step 2: Convert to fraction form
    78,832.74/118,178.79 = 28,901.18/x
  3. Step 3: Cross multiply
    78,832.74x = 118,178.79 × 28,901.18
  4. Step 4: Simplify right side
    78,832.74x = 3,415,505,891.08
  5. Step 5: Solve for x
    x = 3,415,505,891.08/78,832.74
  6. Step 6: Final answer
    x = 43,325.98

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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.