Home / 81,720.91-112,783.98-49,473.30

Finding the Fourth Proportional to 81,720.91, 112,783.98 and 49,473.30

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Solution

The fourth proportional to 81,720.91, 112,783.98 and 49,473.30 is: 68,278.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.91 : 112,783.98 = 49,473.30 : x
  2. Step 2: Convert to fraction form
    81,720.91/112,783.98 = 49,473.30/x
  3. Step 3: Cross multiply
    81,720.91x = 112,783.98 × 49,473.30
  4. Step 4: Simplify right side
    81,720.91x = 5,579,795,440.32
  5. Step 5: Solve for x
    x = 5,579,795,440.32/81,720.91
  6. Step 6: Final answer
    x = 68,278.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.