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Finding the Fourth Proportional to 78,965.28, 118,311.84 and 56,672.46

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Solution

The fourth proportional to 78,965.28, 118,311.84 and 56,672.46 is: 84,911.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,965.28 : 118,311.84 = 56,672.46 : x
  2. Step 2: Convert to fraction form
    78,965.28/118,311.84 = 56,672.46/x
  3. Step 3: Cross multiply
    78,965.28x = 118,311.84 × 56,672.46
  4. Step 4: Simplify right side
    78,965.28x = 6,705,023,019.93
  5. Step 5: Solve for x
    x = 6,705,023,019.93/78,965.28
  6. Step 6: Final answer
    x = 84,911.03

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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.