Home / 81,729.40-122,565.30-29,140.60

Finding the Fourth Proportional to 81,729.40, 122,565.30 and 29,140.60

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Solution

The fourth proportional to 81,729.40, 122,565.30 and 29,140.60 is: 43,700.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,729.40 : 122,565.30 = 29,140.60 : x
  2. Step 2: Convert to fraction form
    81,729.40/122,565.30 = 29,140.60/x
  3. Step 3: Cross multiply
    81,729.40x = 122,565.30 × 29,140.60
  4. Step 4: Simplify right side
    81,729.40x = 3,571,626,381.18
  5. Step 5: Solve for x
    x = 3,571,626,381.18/81,729.40
  6. Step 6: Final answer
    x = 43,700.63

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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.