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Finding the Fourth Proportional to 78,830.60, 118,256.70 and 26,234.60

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Solution

The fourth proportional to 78,830.60, 118,256.70 and 26,234.60 is: 39,355.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,830.60 : 118,256.70 = 26,234.60 : x
  2. Step 2: Convert to fraction form
    78,830.60/118,256.70 = 26,234.60/x
  3. Step 3: Cross multiply
    78,830.60x = 118,256.70 × 26,234.60
  4. Step 4: Simplify right side
    78,830.60x = 3,102,417,221.82
  5. Step 5: Solve for x
    x = 3,102,417,221.82/78,830.60
  6. Step 6: Final answer
    x = 39,355.49

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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.