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Finding the Fourth Proportional to 76,913.80, 106,140.94 and 43,379.80

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Solution

The fourth proportional to 76,913.80, 106,140.94 and 43,379.80 is: 59,864.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,913.80 : 106,140.94 = 43,379.80 : x
  2. Step 2: Convert to fraction form
    76,913.80/106,140.94 = 43,379.80/x
  3. Step 3: Cross multiply
    76,913.80x = 106,140.94 × 43,379.80
  4. Step 4: Simplify right side
    76,913.80x = 4,604,372,749.01
  5. Step 5: Solve for x
    x = 4,604,372,749.01/76,913.80
  6. Step 6: Final answer
    x = 59,864.07

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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.