Home / 76,927.20-115,390.80-47,378.40

Finding the Fourth Proportional to 76,927.20, 115,390.80 and 47,378.40

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Solution

The fourth proportional to 76,927.20, 115,390.80 and 47,378.40 is: 71,067.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,927.20 : 115,390.80 = 47,378.40 : x
  2. Step 2: Convert to fraction form
    76,927.20/115,390.80 = 47,378.40/x
  3. Step 3: Cross multiply
    76,927.20x = 115,390.80 × 47,378.40
  4. Step 4: Simplify right side
    76,927.20x = 5,467,031,478.72
  5. Step 5: Solve for x
    x = 5,467,031,478.72/76,927.20
  6. Step 6: Final answer
    x = 71,067.60

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1.5x scale

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.