Home / 256,159.12-384,238.68-131,420.56

Finding the Fourth Proportional to 256,159.12, 384,238.68 and 131,420.56

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Solution

The fourth proportional to 256,159.12, 384,238.68 and 131,420.56 is: 197,130.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,159.12 : 384,238.68 = 131,420.56 : x
  2. Step 2: Convert to fraction form
    256,159.12/384,238.68 = 131,420.56/x
  3. Step 3: Cross multiply
    256,159.12x = 384,238.68 × 131,420.56
  4. Step 4: Simplify right side
    256,159.12x = 50,496,862,499.26
  5. Step 5: Solve for x
    x = 50,496,862,499.26/256,159.12
  6. Step 6: Final answer
    x = 197,130.84

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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.