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Finding the Fourth Proportional to 78,866.36, 118,165.88 and 47,636

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Solution

The fourth proportional to 78,866.36, 118,165.88 and 47,636 is: 71,373.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,866.36 : 118,165.88 = 47,636 : x
  2. Step 2: Convert to fraction form
    78,866.36/118,165.88 = 47,636/x
  3. Step 3: Cross multiply
    78,866.36x = 118,165.88 × 47,636
  4. Step 4: Simplify right side
    78,866.36x = 5,628,949,859.68
  5. Step 5: Solve for x
    x = 5,628,949,859.68/78,866.36
  6. Step 6: Final answer
    x = 71,373.27

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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.