Home / 81,247.77-121,788.63-31,308.30

Finding the Fourth Proportional to 81,247.77, 121,788.63 and 31,308.30

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Solution

The fourth proportional to 81,247.77, 121,788.63 and 31,308.30 is: 46,930.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,247.77 : 121,788.63 = 31,308.30 : x
  2. Step 2: Convert to fraction form
    81,247.77/121,788.63 = 31,308.30/x
  3. Step 3: Cross multiply
    81,247.77x = 121,788.63 × 31,308.30
  4. Step 4: Simplify right side
    81,247.77x = 3,812,994,964.63
  5. Step 5: Solve for x
    x = 3,812,994,964.63/81,247.77
  6. Step 6: Final answer
    x = 46,930.46

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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.