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Finding the Fourth Proportional to 82,861.40, 124,292.10 and 76,446.20

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Solution

The fourth proportional to 82,861.40, 124,292.10 and 76,446.20 is: 114,669.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,861.40 : 124,292.10 = 76,446.20 : x
  2. Step 2: Convert to fraction form
    82,861.40/124,292.10 = 76,446.20/x
  3. Step 3: Cross multiply
    82,861.40x = 124,292.10 × 76,446.20
  4. Step 4: Simplify right side
    82,861.40x = 9,501,658,735.02
  5. Step 5: Solve for x
    x = 9,501,658,735.02/82,861.40
  6. Step 6: Final answer
    x = 114,669.30

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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.