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Finding the Fourth Proportional to 51,986.80, 78,014.80 and 28,300.32

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Solution

The fourth proportional to 51,986.80, 78,014.80 and 28,300.32 is: 42,469.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,986.80 : 78,014.80 = 28,300.32 : x
  2. Step 2: Convert to fraction form
    51,986.80/78,014.80 = 28,300.32/x
  3. Step 3: Cross multiply
    51,986.80x = 78,014.80 × 28,300.32
  4. Step 4: Simplify right side
    51,986.80x = 2,207,843,804.74
  5. Step 5: Solve for x
    x = 2,207,843,804.74/51,986.80
  6. Step 6: Final answer
    x = 42,469.32

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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.