Home / 78,129.12-117,166.80-25,525.56

Finding the Fourth Proportional to 78,129.12, 117,166.80 and 25,525.56

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Solution

The fourth proportional to 78,129.12, 117,166.80 and 25,525.56 is: 38,279.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,129.12 : 117,166.80 = 25,525.56 : x
  2. Step 2: Convert to fraction form
    78,129.12/117,166.80 = 25,525.56/x
  3. Step 3: Cross multiply
    78,129.12x = 117,166.80 × 25,525.56
  4. Step 4: Simplify right side
    78,129.12x = 2,990,748,183.41
  5. Step 5: Solve for x
    x = 2,990,748,183.41/78,129.12
  6. Step 6: Final answer
    x = 38,279.56

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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.