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Finding the Fourth Proportional to 79,348.86, 109,489.86 and 47,511

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Solution

The fourth proportional to 79,348.86, 109,489.86 and 47,511 is: 65,558.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,348.86 : 109,489.86 = 47,511 : x
  2. Step 2: Convert to fraction form
    79,348.86/109,489.86 = 47,511/x
  3. Step 3: Cross multiply
    79,348.86x = 109,489.86 × 47,511
  4. Step 4: Simplify right side
    79,348.86x = 5,201,972,738.46
  5. Step 5: Solve for x
    x = 5,201,972,738.46/79,348.86
  6. Step 6: Final answer
    x = 65,558.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.