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Finding the Fourth Proportional to 79,530.71, 109,752.45 and 43,721.33

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Solution

The fourth proportional to 79,530.71, 109,752.45 and 43,721.33 is: 60,335.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,530.71 : 109,752.45 = 43,721.33 : x
  2. Step 2: Convert to fraction form
    79,530.71/109,752.45 = 43,721.33/x
  3. Step 3: Cross multiply
    79,530.71x = 109,752.45 × 43,721.33
  4. Step 4: Simplify right side
    79,530.71x = 4,798,523,084.76
  5. Step 5: Solve for x
    x = 4,798,523,084.76/79,530.71
  6. Step 6: Final answer
    x = 60,335.47

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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.