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Finding the Fourth Proportional to 77,612.65, 107,102.45 and 43,622.55

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Solution

The fourth proportional to 77,612.65, 107,102.45 and 43,622.55 is: 60,197.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,612.65 : 107,102.45 = 43,622.55 : x
  2. Step 2: Convert to fraction form
    77,612.65/107,102.45 = 43,622.55/x
  3. Step 3: Cross multiply
    77,612.65x = 107,102.45 × 43,622.55
  4. Step 4: Simplify right side
    77,612.65x = 4,672,082,089.30
  5. Step 5: Solve for x
    x = 4,672,082,089.30/77,612.65
  6. Step 6: Final answer
    x = 60,197.43

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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.