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Finding the Fourth Proportional to 78,783.48, 118,135.80 and 26,174.52

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Solution

The fourth proportional to 78,783.48, 118,135.80 and 26,174.52 is: 39,248.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,783.48 : 118,135.80 = 26,174.52 : x
  2. Step 2: Convert to fraction form
    78,783.48/118,135.80 = 26,174.52/x
  3. Step 3: Cross multiply
    78,783.48x = 118,135.80 × 26,174.52
  4. Step 4: Simplify right side
    78,783.48x = 3,092,147,859.82
  5. Step 5: Solve for x
    x = 3,092,147,859.82/78,783.48
  6. Step 6: Final answer
    x = 39,248.68

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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.