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Finding the Fourth Proportional to 78,868, 118,243.68 and 47,696.32

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Solution

The fourth proportional to 78,868, 118,243.68 and 47,696.32 is: 71,509.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,868 : 118,243.68 = 47,696.32 : x
  2. Step 2: Convert to fraction form
    78,868/118,243.68 = 47,696.32/x
  3. Step 3: Cross multiply
    78,868x = 118,243.68 × 47,696.32
  4. Step 4: Simplify right side
    78,868x = 5,639,788,399.26
  5. Step 5: Solve for x
    x = 5,639,788,399.26/78,868
  6. Step 6: Final answer
    x = 71,509.21

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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.