Home / 261,268.50-391,923-81,331.32

Finding the Fourth Proportional to 261,268.50, 391,923 and 81,331.32

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Solution

The fourth proportional to 261,268.50, 391,923 and 81,331.32 is: 122,003.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,268.50 : 391,923 = 81,331.32 : x
  2. Step 2: Convert to fraction form
    261,268.50/391,923 = 81,331.32/x
  3. Step 3: Cross multiply
    261,268.50x = 391,923 × 81,331.32
  4. Step 4: Simplify right side
    261,268.50x = 31,875,614,928.36
  5. Step 5: Solve for x
    x = 31,875,614,928.36/261,268.50
  6. Step 6: Final answer
    x = 122,003.28

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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.