Home / 80,704.10-121,056.15-45,712.10

Finding the Fourth Proportional to 80,704.10, 121,056.15 and 45,712.10

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Solution

The fourth proportional to 80,704.10, 121,056.15 and 45,712.10 is: 68,568.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,704.10 : 121,056.15 = 45,712.10 : x
  2. Step 2: Convert to fraction form
    80,704.10/121,056.15 = 45,712.10/x
  3. Step 3: Cross multiply
    80,704.10x = 121,056.15 × 45,712.10
  4. Step 4: Simplify right side
    80,704.10x = 5,533,730,834.42
  5. Step 5: Solve for x
    x = 5,533,730,834.42/80,704.10
  6. Step 6: Final answer
    x = 68,568.15

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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.