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Finding the Fourth Proportional to 56,991.69, 78,575.44 and 39,055.56

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Solution

The fourth proportional to 56,991.69, 78,575.44 and 39,055.56 is: 53,846.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,991.69 : 78,575.44 = 39,055.56 : x
  2. Step 2: Convert to fraction form
    56,991.69/78,575.44 = 39,055.56/x
  3. Step 3: Cross multiply
    56,991.69x = 78,575.44 × 39,055.56
  4. Step 4: Simplify right side
    56,991.69x = 3,068,807,713.81
  5. Step 5: Solve for x
    x = 3,068,807,713.81/56,991.69
  6. Step 6: Final answer
    x = 53,846.58

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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.