Home / 84,971.28-127,377.20-28,772.16

Finding the Fourth Proportional to 84,971.28, 127,377.20 and 28,772.16

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Solution

The fourth proportional to 84,971.28, 127,377.20 and 28,772.16 is: 43,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,971.28 : 127,377.20 = 28,772.16 : x
  2. Step 2: Convert to fraction form
    84,971.28/127,377.20 = 28,772.16/x
  3. Step 3: Cross multiply
    84,971.28x = 127,377.20 × 28,772.16
  4. Step 4: Simplify right side
    84,971.28x = 3,664,917,178.75
  5. Step 5: Solve for x
    x = 3,664,917,178.75/84,971.28
  6. Step 6: Final answer
    x = 43,131.25

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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.