Home / 129,979.10-194,640.60-85,364.30

Finding the Fourth Proportional to 129,979.10, 194,640.60 and 85,364.30

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Solution

The fourth proportional to 129,979.10, 194,640.60 and 85,364.30 is: 127,831.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,979.10 : 194,640.60 = 85,364.30 : x
  2. Step 2: Convert to fraction form
    129,979.10/194,640.60 = 85,364.30/x
  3. Step 3: Cross multiply
    129,979.10x = 194,640.60 × 85,364.30
  4. Step 4: Simplify right side
    129,979.10x = 16,615,358,570.58
  5. Step 5: Solve for x
    x = 16,615,358,570.58/129,979.10
  6. Step 6: Final answer
    x = 127,831.00

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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.