Home / 51,315.20-76,972.80-40,947.20

Finding the Fourth Proportional to 51,315.20, 76,972.80 and 40,947.20

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Solution

The fourth proportional to 51,315.20, 76,972.80 and 40,947.20 is: 61,420.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,315.20 : 76,972.80 = 40,947.20 : x
  2. Step 2: Convert to fraction form
    51,315.20/76,972.80 = 40,947.20/x
  3. Step 3: Cross multiply
    51,315.20x = 76,972.80 × 40,947.20
  4. Step 4: Simplify right side
    51,315.20x = 3,151,820,636.16
  5. Step 5: Solve for x
    x = 3,151,820,636.16/51,315.20
  6. Step 6: Final answer
    x = 61,420.80

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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.