Home / 86,023.40-129,035.10-72,245.30

Finding the Fourth Proportional to 86,023.40, 129,035.10 and 72,245.30

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Solution

The fourth proportional to 86,023.40, 129,035.10 and 72,245.30 is: 108,367.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,023.40 : 129,035.10 = 72,245.30 : x
  2. Step 2: Convert to fraction form
    86,023.40/129,035.10 = 72,245.30/x
  3. Step 3: Cross multiply
    86,023.40x = 129,035.10 × 72,245.30
  4. Step 4: Simplify right side
    86,023.40x = 9,322,179,510.03
  5. Step 5: Solve for x
    x = 9,322,179,510.03/86,023.40
  6. Step 6: Final answer
    x = 108,367.95

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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.