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Finding the Fourth Proportional to 79,520.88, 109,693.06 and 47,671.28

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Solution

The fourth proportional to 79,520.88, 109,693.06 and 47,671.28 is: 65,758.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,520.88 : 109,693.06 = 47,671.28 : x
  2. Step 2: Convert to fraction form
    79,520.88/109,693.06 = 47,671.28/x
  3. Step 3: Cross multiply
    79,520.88x = 109,693.06 × 47,671.28
  4. Step 4: Simplify right side
    79,520.88x = 5,229,207,909.67
  5. Step 5: Solve for x
    x = 5,229,207,909.67/79,520.88
  6. Step 6: Final answer
    x = 65,758.93

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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.