Home / 78,281.06-108,777.26-77,468.24

Finding the Fourth Proportional to 78,281.06, 108,777.26 and 77,468.24

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Solution

The fourth proportional to 78,281.06, 108,777.26 and 77,468.24 is: 107,647.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,281.06 : 108,777.26 = 77,468.24 : x
  2. Step 2: Convert to fraction form
    78,281.06/108,777.26 = 77,468.24/x
  3. Step 3: Cross multiply
    78,281.06x = 108,777.26 × 77,468.24
  4. Step 4: Simplify right side
    78,281.06x = 8,426,782,884.22
  5. Step 5: Solve for x
    x = 8,426,782,884.22/78,281.06
  6. Step 6: Final answer
    x = 107,647.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.