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Finding the Fourth Proportional to 81,615.60, 122,423.40 and 73,742.40

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Solution

The fourth proportional to 81,615.60, 122,423.40 and 73,742.40 is: 110,613.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,615.60 : 122,423.40 = 73,742.40 : x
  2. Step 2: Convert to fraction form
    81,615.60/122,423.40 = 73,742.40/x
  3. Step 3: Cross multiply
    81,615.60x = 122,423.40 × 73,742.40
  4. Step 4: Simplify right side
    81,615.60x = 9,027,795,332.16
  5. Step 5: Solve for x
    x = 9,027,795,332.16/81,615.60
  6. Step 6: Final answer
    x = 110,613.60

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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.