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Finding the Fourth Proportional to 51,066.64, 70,471.78 and 28,710.64

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Solution

The fourth proportional to 51,066.64, 70,471.78 and 28,710.64 is: 39,620.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,066.64 : 70,471.78 = 28,710.64 : x
  2. Step 2: Convert to fraction form
    51,066.64/70,471.78 = 28,710.64/x
  3. Step 3: Cross multiply
    51,066.64x = 70,471.78 × 28,710.64
  4. Step 4: Simplify right side
    51,066.64x = 2,023,289,905.74
  5. Step 5: Solve for x
    x = 2,023,289,905.74/51,066.64
  6. Step 6: Final answer
    x = 39,620.58

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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.