Home / 268,238.56-402,387-99,739.12

Finding the Fourth Proportional to 268,238.56, 402,387 and 99,739.12

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Solution

The fourth proportional to 268,238.56, 402,387 and 99,739.12 is: 149,619.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,238.56 : 402,387 = 99,739.12 : x
  2. Step 2: Convert to fraction form
    268,238.56/402,387 = 99,739.12/x
  3. Step 3: Cross multiply
    268,238.56x = 402,387 × 99,739.12
  4. Step 4: Simplify right side
    268,238.56x = 40,133,725,279.44
  5. Step 5: Solve for x
    x = 40,133,725,279.44/268,238.56
  6. Step 6: Final answer
    x = 149,619.52

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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.