Home / 129,917.40-194,876.10-112,421.40

Finding the Fourth Proportional to 129,917.40, 194,876.10 and 112,421.40

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Solution

The fourth proportional to 129,917.40, 194,876.10 and 112,421.40 is: 168,632.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,917.40 : 194,876.10 = 112,421.40 : x
  2. Step 2: Convert to fraction form
    129,917.40/194,876.10 = 112,421.40/x
  3. Step 3: Cross multiply
    129,917.40x = 194,876.10 × 112,421.40
  4. Step 4: Simplify right side
    129,917.40x = 21,908,243,988.54
  5. Step 5: Solve for x
    x = 21,908,243,988.54/129,917.40
  6. Step 6: Final answer
    x = 168,632.10

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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.