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Finding the Fourth Proportional to 207,257.88, 310,361.76 and 128,132.16

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Solution

The fourth proportional to 207,257.88, 310,361.76 and 128,132.16 is: 191,873.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,257.88 : 310,361.76 = 128,132.16 : x
  2. Step 2: Convert to fraction form
    207,257.88/310,361.76 = 128,132.16/x
  3. Step 3: Cross multiply
    207,257.88x = 310,361.76 × 128,132.16
  4. Step 4: Simplify right side
    207,257.88x = 39,767,322,690.20
  5. Step 5: Solve for x
    x = 39,767,322,690.20/207,257.88
  6. Step 6: Final answer
    x = 191,873.63

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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.