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Finding the Fourth Proportional to 51,230.76, 70,699 and 28,874.76

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Solution

The fourth proportional to 51,230.76, 70,699 and 28,874.76 is: 39,847.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,230.76 : 70,699 = 28,874.76 : x
  2. Step 2: Convert to fraction form
    51,230.76/70,699 = 28,874.76/x
  3. Step 3: Cross multiply
    51,230.76x = 70,699 × 28,874.76
  4. Step 4: Simplify right side
    51,230.76x = 2,041,416,657.24
  5. Step 5: Solve for x
    x = 2,041,416,657.24/51,230.76
  6. Step 6: Final answer
    x = 39,847.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.