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Finding the Fourth Proportional to 77,163.80, 115,602.42 and 39,746.57

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Solution

The fourth proportional to 77,163.80, 115,602.42 and 39,746.57 is: 59,546.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,163.80 : 115,602.42 = 39,746.57 : x
  2. Step 2: Convert to fraction form
    77,163.80/115,602.42 = 39,746.57/x
  3. Step 3: Cross multiply
    77,163.80x = 115,602.42 × 39,746.57
  4. Step 4: Simplify right side
    77,163.80x = 4,594,799,678.70
  5. Step 5: Solve for x
    x = 4,594,799,678.70/77,163.80
  6. Step 6: Final answer
    x = 59,546.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.