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Finding the Fourth Proportional to 268,745.65, 403,109.06 and 91,254.20

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Solution

The fourth proportional to 268,745.65, 403,109.06 and 91,254.20 is: 136,878.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,745.65 : 403,109.06 = 91,254.20 : x
  2. Step 2: Convert to fraction form
    268,745.65/403,109.06 = 91,254.20/x
  3. Step 3: Cross multiply
    268,745.65x = 403,109.06 × 91,254.20
  4. Step 4: Simplify right side
    268,745.65x = 36,785,392,311.24
  5. Step 5: Solve for x
    x = 36,785,392,311.24/268,745.65
  6. Step 6: Final answer
    x = 136,878.10

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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.