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Finding the Fourth Proportional to 85,084.69, 127,700.79 and 84,887.86

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Solution

The fourth proportional to 85,084.69, 127,700.79 and 84,887.86 is: 127,405.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,084.69 : 127,700.79 = 84,887.86 : x
  2. Step 2: Convert to fraction form
    85,084.69/127,700.79 = 84,887.86/x
  3. Step 3: Cross multiply
    85,084.69x = 127,700.79 × 84,887.86
  4. Step 4: Simplify right side
    85,084.69x = 10,840,246,783.41
  5. Step 5: Solve for x
    x = 10,840,246,783.41/85,084.69
  6. Step 6: Final answer
    x = 127,405.37

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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.