Home / 51,315.20-76,972.80-31,529.60

Finding the Fourth Proportional to 51,315.20, 76,972.80 and 31,529.60

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Solution

The fourth proportional to 51,315.20, 76,972.80 and 31,529.60 is: 47,294.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,315.20 : 76,972.80 = 31,529.60 : x
  2. Step 2: Convert to fraction form
    51,315.20/76,972.80 = 31,529.60/x
  3. Step 3: Cross multiply
    51,315.20x = 76,972.80 × 31,529.60
  4. Step 4: Simplify right side
    51,315.20x = 2,426,921,594.88
  5. Step 5: Solve for x
    x = 2,426,921,594.88/51,315.20
  6. Step 6: Final answer
    x = 47,294.40

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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.