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Finding the Fourth Proportional to 68,876.19, 103,312.26 and 28,916.46

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Solution

The fourth proportional to 68,876.19, 103,312.26 and 28,916.46 is: 43,373.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,876.19 : 103,312.26 = 28,916.46 : x
  2. Step 2: Convert to fraction form
    68,876.19/103,312.26 = 28,916.46/x
  3. Step 3: Cross multiply
    68,876.19x = 103,312.26 × 28,916.46
  4. Step 4: Simplify right side
    68,876.19x = 2,987,424,833.80
  5. Step 5: Solve for x
    x = 2,987,424,833.80/68,876.19
  6. Step 6: Final answer
    x = 43,373.84

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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.