Home / 81,390.34-122,111.43-34,656.58

Finding the Fourth Proportional to 81,390.34, 122,111.43 and 34,656.58

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Solution

The fourth proportional to 81,390.34, 122,111.43 and 34,656.58 is: 51,995.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,390.34 : 122,111.43 = 34,656.58 : x
  2. Step 2: Convert to fraction form
    81,390.34/122,111.43 = 34,656.58/x
  3. Step 3: Cross multiply
    81,390.34x = 122,111.43 × 34,656.58
  4. Step 4: Simplify right side
    81,390.34x = 4,231,964,542.71
  5. Step 5: Solve for x
    x = 4,231,964,542.71/81,390.34
  6. Step 6: Final answer
    x = 51,995.91

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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.