Home / 78,215.54-107,937.11-42,405.44

Finding the Fourth Proportional to 78,215.54, 107,937.11 and 42,405.44

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Solution

The fourth proportional to 78,215.54, 107,937.11 and 42,405.44 is: 58,519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,215.54 : 107,937.11 = 42,405.44 : x
  2. Step 2: Convert to fraction form
    78,215.54/107,937.11 = 42,405.44/x
  3. Step 3: Cross multiply
    78,215.54x = 107,937.11 × 42,405.44
  4. Step 4: Simplify right side
    78,215.54x = 4,577,120,429.85
  5. Step 5: Solve for x
    x = 4,577,120,429.85/78,215.54
  6. Step 6: Final answer
    x = 58,519.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.