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Finding the Fourth Proportional to 77,183.60, 115,894.20 and 42,191.60

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Solution

The fourth proportional to 77,183.60, 115,894.20 and 42,191.60 is: 63,352.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,183.60 : 115,894.20 = 42,191.60 : x
  2. Step 2: Convert to fraction form
    77,183.60/115,894.20 = 42,191.60/x
  3. Step 3: Cross multiply
    77,183.60x = 115,894.20 × 42,191.60
  4. Step 4: Simplify right side
    77,183.60x = 4,889,761,728.72
  5. Step 5: Solve for x
    x = 4,889,761,728.72/77,183.60
  6. Step 6: Final answer
    x = 63,352.34

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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.