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Finding the Fourth Proportional to 77,571.66, 107,089.80 and 52,211.40

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Solution

The fourth proportional to 77,571.66, 107,089.80 and 52,211.40 is: 72,079.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,571.66 : 107,089.80 = 52,211.40 : x
  2. Step 2: Convert to fraction form
    77,571.66/107,089.80 = 52,211.40/x
  3. Step 3: Cross multiply
    77,571.66x = 107,089.80 × 52,211.40
  4. Step 4: Simplify right side
    77,571.66x = 5,591,308,383.72
  5. Step 5: Solve for x
    x = 5,591,308,383.72/77,571.66
  6. Step 6: Final answer
    x = 72,079.27

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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.