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Finding the Fourth Proportional to 79,640.48, 109,901.53 and 43,830.47

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Solution

The fourth proportional to 79,640.48, 109,901.53 and 43,830.47 is: 60,484.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,640.48 : 109,901.53 = 43,830.47 : x
  2. Step 2: Convert to fraction form
    79,640.48/109,901.53 = 43,830.47/x
  3. Step 3: Cross multiply
    79,640.48x = 109,901.53 × 43,830.47
  4. Step 4: Simplify right side
    79,640.48x = 4,817,035,713.62
  5. Step 5: Solve for x
    x = 4,817,035,713.62/79,640.48
  6. Step 6: Final answer
    x = 60,484.76

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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.