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Finding the Fourth Proportional to 72,356.30, 108,520.05 and 34,916.30

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Solution

The fourth proportional to 72,356.30, 108,520.05 and 34,916.30 is: 52,367.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,356.30 : 108,520.05 = 34,916.30 : x
  2. Step 2: Convert to fraction form
    72,356.30/108,520.05 = 34,916.30/x
  3. Step 3: Cross multiply
    72,356.30x = 108,520.05 × 34,916.30
  4. Step 4: Simplify right side
    72,356.30x = 3,789,118,621.82
  5. Step 5: Solve for x
    x = 3,789,118,621.82/72,356.30
  6. Step 6: Final answer
    x = 52,367.50

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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.