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Finding the Fourth Proportional to 183,691.20, 275,536.80 and 78,715.20

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Solution

The fourth proportional to 183,691.20, 275,536.80 and 78,715.20 is: 118,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    183,691.20 : 275,536.80 = 78,715.20 : x
  2. Step 2: Convert to fraction form
    183,691.20/275,536.80 = 78,715.20/x
  3. Step 3: Cross multiply
    183,691.20x = 275,536.80 × 78,715.20
  4. Step 4: Simplify right side
    183,691.20x = 21,688,934,319.36
  5. Step 5: Solve for x
    x = 21,688,934,319.36/183,691.20
  6. Step 6: Final answer
    x = 118,072.80

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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.