Home / 78,126.15-117,192.12-40,165.26

Finding the Fourth Proportional to 78,126.15, 117,192.12 and 40,165.26

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Solution

The fourth proportional to 78,126.15, 117,192.12 and 40,165.26 is: 60,249.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,126.15 : 117,192.12 = 40,165.26 : x
  2. Step 2: Convert to fraction form
    78,126.15/117,192.12 = 40,165.26/x
  3. Step 3: Cross multiply
    78,126.15x = 117,192.12 × 40,165.26
  4. Step 4: Simplify right side
    78,126.15x = 4,707,051,969.75
  5. Step 5: Solve for x
    x = 4,707,051,969.75/78,126.15
  6. Step 6: Final answer
    x = 60,249.38

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1.5x scale

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.