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Finding the Fourth Proportional to 78,950.70, 108,950.65 and 43,139.89

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Solution

The fourth proportional to 78,950.70, 108,950.65 and 43,139.89 is: 59,532.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,950.70 : 108,950.65 = 43,139.89 : x
  2. Step 2: Convert to fraction form
    78,950.70/108,950.65 = 43,139.89/x
  3. Step 3: Cross multiply
    78,950.70x = 108,950.65 × 43,139.89
  4. Step 4: Simplify right side
    78,950.70x = 4,700,118,511.68
  5. Step 5: Solve for x
    x = 4,700,118,511.68/78,950.70
  6. Step 6: Final answer
    x = 59,532.33

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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.