Home / 81,790.56-122,700.06-31,897.80

Finding the Fourth Proportional to 81,790.56, 122,700.06 and 31,897.80

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Solution

The fourth proportional to 81,790.56, 122,700.06 and 31,897.80 is: 47,852.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,790.56 : 122,700.06 = 31,897.80 : x
  2. Step 2: Convert to fraction form
    81,790.56/122,700.06 = 31,897.80/x
  3. Step 3: Cross multiply
    81,790.56x = 122,700.06 × 31,897.80
  4. Step 4: Simplify right side
    81,790.56x = 3,913,861,973.87
  5. Step 5: Solve for x
    x = 3,913,861,973.87/81,790.56
  6. Step 6: Final answer
    x = 47,852.25

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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.