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Finding the Fourth Proportional to 78,929.18, 118,389.90 and 29,005.44

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Solution

The fourth proportional to 78,929.18, 118,389.90 and 29,005.44 is: 43,506.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,929.18 : 118,389.90 = 29,005.44 : x
  2. Step 2: Convert to fraction form
    78,929.18/118,389.90 = 29,005.44/x
  3. Step 3: Cross multiply
    78,929.18x = 118,389.90 × 29,005.44
  4. Step 4: Simplify right side
    78,929.18x = 3,433,951,141.06
  5. Step 5: Solve for x
    x = 3,433,951,141.06/78,929.18
  6. Step 6: Final answer
    x = 43,506.74

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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.