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Finding the Fourth Proportional to 78,939, 118,455.17 and 29,054.12

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Solution

The fourth proportional to 78,939, 118,455.17 and 29,054.12 is: 43,598.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939 : 118,455.17 = 29,054.12 : x
  2. Step 2: Convert to fraction form
    78,939/118,455.17 = 29,054.12/x
  3. Step 3: Cross multiply
    78,939x = 118,455.17 × 29,054.12
  4. Step 4: Simplify right side
    78,939x = 3,441,609,986.25
  5. Step 5: Solve for x
    x = 3,441,609,986.25/78,939
  6. Step 6: Final answer
    x = 43,598.35

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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.