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Finding the Fourth Proportional to 65,437.77, 90,301.74 and 39,986.73

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Solution

The fourth proportional to 65,437.77, 90,301.74 and 39,986.73 is: 55,180.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,437.77 : 90,301.74 = 39,986.73 : x
  2. Step 2: Convert to fraction form
    65,437.77/90,301.74 = 39,986.73/x
  3. Step 3: Cross multiply
    65,437.77x = 90,301.74 × 39,986.73
  4. Step 4: Simplify right side
    65,437.77x = 3,610,871,589.48
  5. Step 5: Solve for x
    x = 3,610,871,589.48/65,437.77
  6. Step 6: Final answer
    x = 55,180.23

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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.