Home / 78,821.08-118,228.32-36,686.68

Finding the Fourth Proportional to 78,821.08, 118,228.32 and 36,686.68

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Solution

The fourth proportional to 78,821.08, 118,228.32 and 36,686.68 is: 55,028.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,821.08 : 118,228.32 = 36,686.68 : x
  2. Step 2: Convert to fraction form
    78,821.08/118,228.32 = 36,686.68/x
  3. Step 3: Cross multiply
    78,821.08x = 118,228.32 × 36,686.68
  4. Step 4: Simplify right side
    78,821.08x = 4,337,404,542.78
  5. Step 5: Solve for x
    x = 4,337,404,542.78/78,821.08
  6. Step 6: Final answer
    x = 55,028.48

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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.