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Finding the Fourth Proportional to 98,479.08, 147,744 and 28,363.86

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Solution

The fourth proportional to 98,479.08, 147,744 and 28,363.86 is: 42,553.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,479.08 : 147,744 = 28,363.86 : x
  2. Step 2: Convert to fraction form
    98,479.08/147,744 = 28,363.86/x
  3. Step 3: Cross multiply
    98,479.08x = 147,744 × 28,363.86
  4. Step 4: Simplify right side
    98,479.08x = 4,190,590,131.84
  5. Step 5: Solve for x
    x = 4,190,590,131.84/98,479.08
  6. Step 6: Final answer
    x = 42,553.10

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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.