Home / 81,539.10-112,528.80-45,731.12

Finding the Fourth Proportional to 81,539.10, 112,528.80 and 45,731.12

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Solution

The fourth proportional to 81,539.10, 112,528.80 and 45,731.12 is: 63,111.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,539.10 : 112,528.80 = 45,731.12 : x
  2. Step 2: Convert to fraction form
    81,539.10/112,528.80 = 45,731.12/x
  3. Step 3: Cross multiply
    81,539.10x = 112,528.80 × 45,731.12
  4. Step 4: Simplify right side
    81,539.10x = 5,146,067,493.61
  5. Step 5: Solve for x
    x = 5,146,067,493.61/81,539.10
  6. Step 6: Final answer
    x = 63,111.65

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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.