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Finding the Fourth Proportional to 77,171.45, 116,335.59 and 72,027.74

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Solution

The fourth proportional to 77,171.45, 116,335.59 and 72,027.74 is: 108,581.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,171.45 : 116,335.59 = 72,027.74 : x
  2. Step 2: Convert to fraction form
    77,171.45/116,335.59 = 72,027.74/x
  3. Step 3: Cross multiply
    77,171.45x = 116,335.59 × 72,027.74
  4. Step 4: Simplify right side
    77,171.45x = 8,379,389,629.27
  5. Step 5: Solve for x
    x = 8,379,389,629.27/77,171.45
  6. Step 6: Final answer
    x = 108,581.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.