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Finding the Fourth Proportional to 91,090.31, 125,715.60 and 53,364.56

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Solution

The fourth proportional to 91,090.31, 125,715.60 and 53,364.56 is: 73,649.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,090.31 : 125,715.60 = 53,364.56 : x
  2. Step 2: Convert to fraction form
    91,090.31/125,715.60 = 53,364.56/x
  3. Step 3: Cross multiply
    91,090.31x = 125,715.60 × 53,364.56
  4. Step 4: Simplify right side
    91,090.31x = 6,708,757,993.43
  5. Step 5: Solve for x
    x = 6,708,757,993.43/91,090.31
  6. Step 6: Final answer
    x = 73,649.52

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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.