Home / 78,003.10-117,004.65-70,129.90

Finding the Fourth Proportional to 78,003.10, 117,004.65 and 70,129.90

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Solution

The fourth proportional to 78,003.10, 117,004.65 and 70,129.90 is: 105,194.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003.10 : 117,004.65 = 70,129.90 : x
  2. Step 2: Convert to fraction form
    78,003.10/117,004.65 = 70,129.90/x
  3. Step 3: Cross multiply
    78,003.10x = 117,004.65 × 70,129.90
  4. Step 4: Simplify right side
    78,003.10x = 8,205,524,404.04
  5. Step 5: Solve for x
    x = 8,205,524,404.04/78,003.10
  6. Step 6: Final answer
    x = 105,194.85

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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.