Home / 129,416.80-194,125.20-76,885.60

Finding the Fourth Proportional to 129,416.80, 194,125.20 and 76,885.60

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Solution

The fourth proportional to 129,416.80, 194,125.20 and 76,885.60 is: 115,328.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,416.80 : 194,125.20 = 76,885.60 : x
  2. Step 2: Convert to fraction form
    129,416.80/194,125.20 = 76,885.60/x
  3. Step 3: Cross multiply
    129,416.80x = 194,125.20 × 76,885.60
  4. Step 4: Simplify right side
    129,416.80x = 14,925,432,477.12
  5. Step 5: Solve for x
    x = 14,925,432,477.12/129,416.80
  6. Step 6: Final answer
    x = 115,328.40

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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.