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Finding the Fourth Proportional to 51,107.63, 70,529.90 and 28,138.15

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Solution

The fourth proportional to 51,107.63, 70,529.90 and 28,138.15 is: 38,831.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,107.63 : 70,529.90 = 28,138.15 : x
  2. Step 2: Convert to fraction form
    51,107.63/70,529.90 = 28,138.15/x
  3. Step 3: Cross multiply
    51,107.63x = 70,529.90 × 28,138.15
  4. Step 4: Simplify right side
    51,107.63x = 1,984,580,575.39
  5. Step 5: Solve for x
    x = 1,984,580,575.39/51,107.63
  6. Step 6: Final answer
    x = 38,831.40

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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.