Home / 81,002.34-121,498.11-38,912.58

Finding the Fourth Proportional to 81,002.34, 121,498.11 and 38,912.58

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Solution

The fourth proportional to 81,002.34, 121,498.11 and 38,912.58 is: 58,366.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.34 : 121,498.11 = 38,912.58 : x
  2. Step 2: Convert to fraction form
    81,002.34/121,498.11 = 38,912.58/x
  3. Step 3: Cross multiply
    81,002.34x = 121,498.11 × 38,912.58
  4. Step 4: Simplify right side
    81,002.34x = 4,727,804,925.22
  5. Step 5: Solve for x
    x = 4,727,804,925.22/81,002.34
  6. Step 6: Final answer
    x = 58,366.28

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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.