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Finding the Fourth Proportional to 79,509.76, 109,718.81 and 43,699.80

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Solution

The fourth proportional to 79,509.76, 109,718.81 and 43,699.80 is: 60,303.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,509.76 : 109,718.81 = 43,699.80 : x
  2. Step 2: Convert to fraction form
    79,509.76/109,718.81 = 43,699.80/x
  3. Step 3: Cross multiply
    79,509.76x = 109,718.81 × 43,699.80
  4. Step 4: Simplify right side
    79,509.76x = 4,794,689,504.64
  5. Step 5: Solve for x
    x = 4,794,689,504.64/79,509.76
  6. Step 6: Final answer
    x = 60,303.16

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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.