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Finding the Fourth Proportional to 79,428.60, 109,707.21 and 63,351.72

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Solution

The fourth proportional to 79,428.60, 109,707.21 and 63,351.72 is: 87,501.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,428.60 : 109,707.21 = 63,351.72 : x
  2. Step 2: Convert to fraction form
    79,428.60/109,707.21 = 63,351.72/x
  3. Step 3: Cross multiply
    79,428.60x = 109,707.21 × 63,351.72
  4. Step 4: Simplify right side
    79,428.60x = 6,950,140,449.90
  5. Step 5: Solve for x
    x = 6,950,140,449.90/79,428.60
  6. Step 6: Final answer
    x = 87,501.74

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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.