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Finding the Fourth Proportional to 77,219.80, 106,575.42 and 55,991.32

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Solution

The fourth proportional to 77,219.80, 106,575.42 and 55,991.32 is: 77,276.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,219.80 : 106,575.42 = 55,991.32 : x
  2. Step 2: Convert to fraction form
    77,219.80/106,575.42 = 55,991.32/x
  3. Step 3: Cross multiply
    77,219.80x = 106,575.42 × 55,991.32
  4. Step 4: Simplify right side
    77,219.80x = 5,967,298,445.35
  5. Step 5: Solve for x
    x = 5,967,298,445.35/77,219.80
  6. Step 6: Final answer
    x = 77,276.79

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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.