Home / 85,138.40-127,721.10-28,983.80

Finding the Fourth Proportional to 85,138.40, 127,721.10 and 28,983.80

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Solution

The fourth proportional to 85,138.40, 127,721.10 and 28,983.80 is: 43,480.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,138.40 : 127,721.10 = 28,983.80 : x
  2. Step 2: Convert to fraction form
    85,138.40/127,721.10 = 28,983.80/x
  3. Step 3: Cross multiply
    85,138.40x = 127,721.10 × 28,983.80
  4. Step 4: Simplify right side
    85,138.40x = 3,701,842,818.18
  5. Step 5: Solve for x
    x = 3,701,842,818.18/85,138.40
  6. Step 6: Final answer
    x = 43,480.30

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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.