Home / 81,688.90-112,731.48-47,231.05

Finding the Fourth Proportional to 81,688.90, 112,731.48 and 47,231.05

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Solution

The fourth proportional to 81,688.90, 112,731.48 and 47,231.05 is: 65,179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,688.90 : 112,731.48 = 47,231.05 : x
  2. Step 2: Convert to fraction form
    81,688.90/112,731.48 = 47,231.05/x
  3. Step 3: Cross multiply
    81,688.90x = 112,731.48 × 47,231.05
  4. Step 4: Simplify right side
    81,688.90x = 5,324,425,886.63
  5. Step 5: Solve for x
    x = 5,324,425,886.63/81,688.90
  6. Step 6: Final answer
    x = 65,179.30

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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.