Home / 129,920.10-194,880.15-87,820.35

Finding the Fourth Proportional to 129,920.10, 194,880.15 and 87,820.35

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Solution

The fourth proportional to 129,920.10, 194,880.15 and 87,820.35 is: 131,730.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,920.10 : 194,880.15 = 87,820.35 : x
  2. Step 2: Convert to fraction form
    129,920.10/194,880.15 = 87,820.35/x
  3. Step 3: Cross multiply
    129,920.10x = 194,880.15 × 87,820.35
  4. Step 4: Simplify right side
    129,920.10x = 17,114,442,981.05
  5. Step 5: Solve for x
    x = 17,114,442,981.05/129,920.10
  6. Step 6: Final answer
    x = 131,730.53

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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.