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Finding the Fourth Proportional to 259,473.77, 389,208.32 and 81,980.77

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Solution

The fourth proportional to 259,473.77, 389,208.32 and 81,980.77 is: 122,970.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,473.77 : 389,208.32 = 81,980.77 : x
  2. Step 2: Convert to fraction form
    259,473.77/389,208.32 = 81,980.77/x
  3. Step 3: Cross multiply
    259,473.77x = 389,208.32 × 81,980.77
  4. Step 4: Simplify right side
    259,473.77x = 31,907,596,381.08
  5. Step 5: Solve for x
    x = 31,907,596,381.08/259,473.77
  6. Step 6: Final answer
    x = 122,970.41

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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.