Home / 129,878.20-194,720.10-70,780.60

Finding the Fourth Proportional to 129,878.20, 194,720.10 and 70,780.60

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Solution

The fourth proportional to 129,878.20, 194,720.10 and 70,780.60 is: 106,117.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,878.20 : 194,720.10 = 70,780.60 : x
  2. Step 2: Convert to fraction form
    129,878.20/194,720.10 = 70,780.60/x
  3. Step 3: Cross multiply
    129,878.20x = 194,720.10 × 70,780.60
  4. Step 4: Simplify right side
    129,878.20x = 13,782,405,510.06
  5. Step 5: Solve for x
    x = 13,782,405,510.06/129,878.20
  6. Step 6: Final answer
    x = 106,117.93

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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.