Home / 129,860.40-194,656.20-70,570.80

Finding the Fourth Proportional to 129,860.40, 194,656.20 and 70,570.80

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Solution

The fourth proportional to 129,860.40, 194,656.20 and 70,570.80 is: 105,783.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,860.40 : 194,656.20 = 70,570.80 : x
  2. Step 2: Convert to fraction form
    129,860.40/194,656.20 = 70,570.80/x
  3. Step 3: Cross multiply
    129,860.40x = 194,656.20 × 70,570.80
  4. Step 4: Simplify right side
    129,860.40x = 13,737,043,758.96
  5. Step 5: Solve for x
    x = 13,737,043,758.96/129,860.40
  6. Step 6: Final answer
    x = 105,783.16

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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.