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Finding the Fourth Proportional to 51,168.70, 76,643.70 and 42,420.70

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Solution

The fourth proportional to 51,168.70, 76,643.70 and 42,420.70 is: 63,540.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,168.70 : 76,643.70 = 42,420.70 : x
  2. Step 2: Convert to fraction form
    51,168.70/76,643.70 = 42,420.70/x
  3. Step 3: Cross multiply
    51,168.70x = 76,643.70 × 42,420.70
  4. Step 4: Simplify right side
    51,168.70x = 3,251,279,404.59
  5. Step 5: Solve for x
    x = 3,251,279,404.59/51,168.70
  6. Step 6: Final answer
    x = 63,540.39

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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.