Home / 223,974.45-309,079.40-128,475.05

Finding the Fourth Proportional to 223,974.45, 309,079.40 and 128,475.05

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Solution

The fourth proportional to 223,974.45, 309,079.40 and 128,475.05 is: 177,292.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,974.45 : 309,079.40 = 128,475.05 : x
  2. Step 2: Convert to fraction form
    223,974.45/309,079.40 = 128,475.05/x
  3. Step 3: Cross multiply
    223,974.45x = 309,079.40 × 128,475.05
  4. Step 4: Simplify right side
    223,974.45x = 39,708,989,181.20
  5. Step 5: Solve for x
    x = 39,708,989,181.20/223,974.45
  6. Step 6: Final answer
    x = 177,292.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.