Home / 81,286.74-112,214.06-61,151.31

Finding the Fourth Proportional to 81,286.74, 112,214.06 and 61,151.31

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Solution

The fourth proportional to 81,286.74, 112,214.06 and 61,151.31 is: 84,417.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,286.74 : 112,214.06 = 61,151.31 : x
  2. Step 2: Convert to fraction form
    81,286.74/112,214.06 = 61,151.31/x
  3. Step 3: Cross multiply
    81,286.74x = 112,214.06 × 61,151.31
  4. Step 4: Simplify right side
    81,286.74x = 6,862,036,769.42
  5. Step 5: Solve for x
    x = 6,862,036,769.42/81,286.74
  6. Step 6: Final answer
    x = 84,417.66

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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.