Home / 129,808.40-194,578.20-70,518.80

Finding the Fourth Proportional to 129,808.40, 194,578.20 and 70,518.80

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Solution

The fourth proportional to 129,808.40, 194,578.20 and 70,518.80 is: 105,705.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,808.40 : 194,578.20 = 70,518.80 : x
  2. Step 2: Convert to fraction form
    129,808.40/194,578.20 = 70,518.80/x
  3. Step 3: Cross multiply
    129,808.40x = 194,578.20 × 70,518.80
  4. Step 4: Simplify right side
    129,808.40x = 13,721,421,170.16
  5. Step 5: Solve for x
    x = 13,721,421,170.16/129,808.40
  6. Step 6: Final answer
    x = 105,705.19

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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.