Home / 129,628.08-194,451.48-45,378.72

Finding the Fourth Proportional to 129,628.08, 194,451.48 and 45,378.72

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Solution

The fourth proportional to 129,628.08, 194,451.48 and 45,378.72 is: 68,071.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,628.08 : 194,451.48 = 45,378.72 : x
  2. Step 2: Convert to fraction form
    129,628.08/194,451.48 = 45,378.72/x
  3. Step 3: Cross multiply
    129,628.08x = 194,451.48 × 45,378.72
  4. Step 4: Simplify right side
    129,628.08x = 8,823,959,264.51
  5. Step 5: Solve for x
    x = 8,823,959,264.51/129,628.08
  6. Step 6: Final answer
    x = 68,071.36

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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.