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Finding the Fourth Proportional to 85,108.97, 127,776.54 and 72,708.68

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Solution

The fourth proportional to 85,108.97, 127,776.54 and 72,708.68 is: 109,159.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,108.97 : 127,776.54 = 72,708.68 : x
  2. Step 2: Convert to fraction form
    85,108.97/127,776.54 = 72,708.68/x
  3. Step 3: Cross multiply
    85,108.97x = 127,776.54 × 72,708.68
  4. Step 4: Simplify right side
    85,108.97x = 9,290,463,558.37
  5. Step 5: Solve for x
    x = 9,290,463,558.37/85,108.97
  6. Step 6: Final answer
    x = 109,159.63

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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.