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Finding the Fourth Proportional to 51,065.64, 70,470.41 and 28,709.64

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Solution

The fourth proportional to 51,065.64, 70,470.41 and 28,709.64 is: 39,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,065.64 : 70,470.41 = 28,709.64 : x
  2. Step 2: Convert to fraction form
    51,065.64/70,470.41 = 28,709.64/x
  3. Step 3: Cross multiply
    51,065.64x = 70,470.41 × 28,709.64
  4. Step 4: Simplify right side
    51,065.64x = 2,023,179,958.20
  5. Step 5: Solve for x
    x = 2,023,179,958.20/51,065.64
  6. Step 6: Final answer
    x = 39,619.20

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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.