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Finding the Fourth Proportional to 72,612.10, 108,934.35 and 28,234.90

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Solution

The fourth proportional to 72,612.10, 108,934.35 and 28,234.90 is: 42,358.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.10 : 108,934.35 = 28,234.90 : x
  2. Step 2: Convert to fraction form
    72,612.10/108,934.35 = 28,234.90/x
  3. Step 3: Cross multiply
    72,612.10x = 108,934.35 × 28,234.90
  4. Step 4: Simplify right side
    72,612.10x = 3,075,750,478.82
  5. Step 5: Solve for x
    x = 3,075,750,478.82/72,612.10
  6. Step 6: Final answer
    x = 42,358.65

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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.