Home / 81,030.40-121,617.60-47,708.80

Finding the Fourth Proportional to 81,030.40, 121,617.60 and 47,708.80

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Solution

The fourth proportional to 81,030.40, 121,617.60 and 47,708.80 is: 71,605.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,030.40 : 121,617.60 = 47,708.80 : x
  2. Step 2: Convert to fraction form
    81,030.40/121,617.60 = 47,708.80/x
  3. Step 3: Cross multiply
    81,030.40x = 121,617.60 × 47,708.80
  4. Step 4: Simplify right side
    81,030.40x = 5,802,229,754.88
  5. Step 5: Solve for x
    x = 5,802,229,754.88/81,030.40
  6. Step 6: Final answer
    x = 71,605.59

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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.