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Finding the Fourth Proportional to 77,561.72, 107,035.61 and 43,571.64

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Solution

The fourth proportional to 77,561.72, 107,035.61 and 43,571.64 is: 60,129.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,561.72 : 107,035.61 = 43,571.64 : x
  2. Step 2: Convert to fraction form
    77,561.72/107,035.61 = 43,571.64/x
  3. Step 3: Cross multiply
    77,561.72x = 107,035.61 × 43,571.64
  4. Step 4: Simplify right side
    77,561.72x = 4,663,717,066.10
  5. Step 5: Solve for x
    x = 4,663,717,066.10/77,561.72
  6. Step 6: Final answer
    x = 60,129.11

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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.