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Finding the Fourth Proportional to 78,898.68, 118,307.22 and 28,965.96

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Solution

The fourth proportional to 78,898.68, 118,307.22 and 28,965.96 is: 43,433.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,898.68 : 118,307.22 = 28,965.96 : x
  2. Step 2: Convert to fraction form
    78,898.68/118,307.22 = 28,965.96/x
  3. Step 3: Cross multiply
    78,898.68x = 118,307.22 × 28,965.96
  4. Step 4: Simplify right side
    78,898.68x = 3,426,882,202.23
  5. Step 5: Solve for x
    x = 3,426,882,202.23/78,898.68
  6. Step 6: Final answer
    x = 43,433.96

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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.