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Finding the Fourth Proportional to 65,729.52, 98,608.86 and 18,978.84

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Solution

The fourth proportional to 65,729.52, 98,608.86 and 18,978.84 is: 28,472.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,729.52 : 98,608.86 = 18,978.84 : x
  2. Step 2: Convert to fraction form
    65,729.52/98,608.86 = 18,978.84/x
  3. Step 3: Cross multiply
    65,729.52x = 98,608.86 × 18,978.84
  4. Step 4: Simplify right side
    65,729.52x = 1,871,481,776.52
  5. Step 5: Solve for x
    x = 1,871,481,776.52/65,729.52
  6. Step 6: Final answer
    x = 28,472.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.