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Finding the Fourth Proportional to 85,325.81, 127,422.82 and 84,399.06

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Solution

The fourth proportional to 85,325.81, 127,422.82 and 84,399.06 is: 126,038.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,325.81 : 127,422.82 = 84,399.06 : x
  2. Step 2: Convert to fraction form
    85,325.81/127,422.82 = 84,399.06/x
  3. Step 3: Cross multiply
    85,325.81x = 127,422.82 × 84,399.06
  4. Step 4: Simplify right side
    85,325.81x = 10,754,366,813.88
  5. Step 5: Solve for x
    x = 10,754,366,813.88/85,325.81
  6. Step 6: Final answer
    x = 126,038.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.