Home / 78,916.28-118,426.20-28,996.79

Finding the Fourth Proportional to 78,916.28, 118,426.20 and 28,996.79

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Solution

The fourth proportional to 78,916.28, 118,426.20 and 28,996.79 is: 43,514.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,916.28 : 118,426.20 = 28,996.79 : x
  2. Step 2: Convert to fraction form
    78,916.28/118,426.20 = 28,996.79/x
  3. Step 3: Cross multiply
    78,916.28x = 118,426.20 × 28,996.79
  4. Step 4: Simplify right side
    78,916.28x = 3,433,979,651.90
  5. Step 5: Solve for x
    x = 3,433,979,651.90/78,916.28
  6. Step 6: Final answer
    x = 43,514.21

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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.