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Finding the Fourth Proportional to 86,523.40, 129,785.10 and 56,974.60

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Solution

The fourth proportional to 86,523.40, 129,785.10 and 56,974.60 is: 85,461.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,523.40 : 129,785.10 = 56,974.60 : x
  2. Step 2: Convert to fraction form
    86,523.40/129,785.10 = 56,974.60/x
  3. Step 3: Cross multiply
    86,523.40x = 129,785.10 × 56,974.60
  4. Step 4: Simplify right side
    86,523.40x = 7,394,454,158.46
  5. Step 5: Solve for x
    x = 7,394,454,158.46/86,523.40
  6. Step 6: Final answer
    x = 85,461.90

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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.