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Finding the Fourth Proportional to 77,564.80, 107,049.52 and 47,343.84

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Solution

The fourth proportional to 77,564.80, 107,049.52 and 47,343.84 is: 65,340.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,564.80 : 107,049.52 = 47,343.84 : x
  2. Step 2: Convert to fraction form
    77,564.80/107,049.52 = 47,343.84/x
  3. Step 3: Cross multiply
    77,564.80x = 107,049.52 × 47,343.84
  4. Step 4: Simplify right side
    77,564.80x = 5,068,135,346.96
  5. Step 5: Solve for x
    x = 5,068,135,346.96/77,564.80
  6. Step 6: Final answer
    x = 65,340.66

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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.