Home / 81,726.40-122,589.60-31,808.80

Finding the Fourth Proportional to 81,726.40, 122,589.60 and 31,808.80

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Solution

The fourth proportional to 81,726.40, 122,589.60 and 31,808.80 is: 47,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,726.40 : 122,589.60 = 31,808.80 : x
  2. Step 2: Convert to fraction form
    81,726.40/122,589.60 = 31,808.80/x
  3. Step 3: Cross multiply
    81,726.40x = 122,589.60 × 31,808.80
  4. Step 4: Simplify right side
    81,726.40x = 3,899,428,068.48
  5. Step 5: Solve for x
    x = 3,899,428,068.48/81,726.40
  6. Step 6: Final answer
    x = 47,713.20

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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.