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Finding the Fourth Proportional to 51,976.30, 77,964.45 and 45,415.30

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Solution

The fourth proportional to 51,976.30, 77,964.45 and 45,415.30 is: 68,122.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,976.30 : 77,964.45 = 45,415.30 : x
  2. Step 2: Convert to fraction form
    51,976.30/77,964.45 = 45,415.30/x
  3. Step 3: Cross multiply
    51,976.30x = 77,964.45 × 45,415.30
  4. Step 4: Simplify right side
    51,976.30x = 3,540,778,886.09
  5. Step 5: Solve for x
    x = 3,540,778,886.09/51,976.30
  6. Step 6: Final answer
    x = 68,122.95

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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.