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Finding the Fourth Proportional to 79,645.98, 109,909.28 and 43,345.88

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Solution

The fourth proportional to 79,645.98, 109,909.28 and 43,345.88 is: 59,816.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,645.98 : 109,909.28 = 43,345.88 : x
  2. Step 2: Convert to fraction form
    79,645.98/109,909.28 = 43,345.88/x
  3. Step 3: Cross multiply
    79,645.98x = 109,909.28 × 43,345.88
  4. Step 4: Simplify right side
    79,645.98x = 4,764,114,929.07
  5. Step 5: Solve for x
    x = 4,764,114,929.07/79,645.98
  6. Step 6: Final answer
    x = 59,816.14

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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.