Home / 78,859.36-118,155.39-47,629

Finding the Fourth Proportional to 78,859.36, 118,155.39 and 47,629

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Solution

The fourth proportional to 78,859.36, 118,155.39 and 47,629 is: 71,362.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,859.36 : 118,155.39 = 47,629 : x
  2. Step 2: Convert to fraction form
    78,859.36/118,155.39 = 47,629/x
  3. Step 3: Cross multiply
    78,859.36x = 118,155.39 × 47,629
  4. Step 4: Simplify right side
    78,859.36x = 5,627,623,070.31
  5. Step 5: Solve for x
    x = 5,627,623,070.31/78,859.36
  6. Step 6: Final answer
    x = 71,362.78

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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.