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Finding the Fourth Proportional to 86,039.82, 128,891.70 and 56,367.54

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Solution

The fourth proportional to 86,039.82, 128,891.70 and 56,367.54 is: 84,441.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,039.82 : 128,891.70 = 56,367.54 : x
  2. Step 2: Convert to fraction form
    86,039.82/128,891.70 = 56,367.54/x
  3. Step 3: Cross multiply
    86,039.82x = 128,891.70 × 56,367.54
  4. Step 4: Simplify right side
    86,039.82x = 7,265,308,055.42
  5. Step 5: Solve for x
    x = 7,265,308,055.42/86,039.82
  6. Step 6: Final answer
    x = 84,441.23

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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.