Home / 81,054.46-121,580.64-21,077.62

Finding the Fourth Proportional to 81,054.46, 121,580.64 and 21,077.62

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Solution

The fourth proportional to 81,054.46, 121,580.64 and 21,077.62 is: 31,616.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,054.46 : 121,580.64 = 21,077.62 : x
  2. Step 2: Convert to fraction form
    81,054.46/121,580.64 = 21,077.62/x
  3. Step 3: Cross multiply
    81,054.46x = 121,580.64 × 21,077.62
  4. Step 4: Simplify right side
    81,054.46x = 2,562,630,529.28
  5. Step 5: Solve for x
    x = 2,562,630,529.28/81,054.46
  6. Step 6: Final answer
    x = 31,616.16

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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.