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Finding the Fourth Proportional to 85,168.84, 116,681.84 and 81,976.48

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Solution

The fourth proportional to 85,168.84, 116,681.84 and 81,976.48 is: 112,308.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,168.84 : 116,681.84 = 81,976.48 : x
  2. Step 2: Convert to fraction form
    85,168.84/116,681.84 = 81,976.48/x
  3. Step 3: Cross multiply
    85,168.84x = 116,681.84 × 81,976.48
  4. Step 4: Simplify right side
    85,168.84x = 9,565,166,523.12
  5. Step 5: Solve for x
    x = 9,565,166,523.12/85,168.84
  6. Step 6: Final answer
    x = 112,308.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.