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Finding the Fourth Proportional to 65,629.94, 90,537.80 and 42,958.94

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Solution

The fourth proportional to 65,629.94, 90,537.80 and 42,958.94 is: 59,262.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,629.94 : 90,537.80 = 42,958.94 : x
  2. Step 2: Convert to fraction form
    65,629.94/90,537.80 = 42,958.94/x
  3. Step 3: Cross multiply
    65,629.94x = 90,537.80 × 42,958.94
  4. Step 4: Simplify right side
    65,629.94x = 3,889,407,250.45
  5. Step 5: Solve for x
    x = 3,889,407,250.45/65,629.94
  6. Step 6: Final answer
    x = 59,262.70

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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.