Home / 84,838.20-127,176.30-31,515.90

Finding the Fourth Proportional to 84,838.20, 127,176.30 and 31,515.90

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Solution

The fourth proportional to 84,838.20, 127,176.30 and 31,515.90 is: 47,243.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,838.20 : 127,176.30 = 31,515.90 : x
  2. Step 2: Convert to fraction form
    84,838.20/127,176.30 = 31,515.90/x
  3. Step 3: Cross multiply
    84,838.20x = 127,176.30 × 31,515.90
  4. Step 4: Simplify right side
    84,838.20x = 4,008,075,553.17
  5. Step 5: Solve for x
    x = 4,008,075,553.17/84,838.20
  6. Step 6: Final answer
    x = 47,243.76

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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.