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Finding the Fourth Proportional to 78,983.58, 118,493.90 and 54,035.37

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Solution

The fourth proportional to 78,983.58, 118,493.90 and 54,035.37 is: 81,065.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,983.58 : 118,493.90 = 54,035.37 : x
  2. Step 2: Convert to fraction form
    78,983.58/118,493.90 = 54,035.37/x
  3. Step 3: Cross multiply
    78,983.58x = 118,493.90 × 54,035.37
  4. Step 4: Simplify right side
    78,983.58x = 6,402,861,459.07
  5. Step 5: Solve for x
    x = 6,402,861,459.07/78,983.58
  6. Step 6: Final answer
    x = 81,065.73

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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.