Home / 78,654.08-117,909.82-39,223.28

Finding the Fourth Proportional to 78,654.08, 117,909.82 and 39,223.28

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Solution

The fourth proportional to 78,654.08, 117,909.82 and 39,223.28 is: 58,799.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,654.08 : 117,909.82 = 39,223.28 : x
  2. Step 2: Convert to fraction form
    78,654.08/117,909.82 = 39,223.28/x
  3. Step 3: Cross multiply
    78,654.08x = 117,909.82 × 39,223.28
  4. Step 4: Simplify right side
    78,654.08x = 4,624,809,884.61
  5. Step 5: Solve for x
    x = 4,624,809,884.61/78,654.08
  6. Step 6: Final answer
    x = 58,799.36

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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.