Home / 81,318-112,326.05-62,431.12

Finding the Fourth Proportional to 81,318, 112,326.05 and 62,431.12

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Solution

The fourth proportional to 81,318, 112,326.05 and 62,431.12 is: 86,237.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,318 : 112,326.05 = 62,431.12 : x
  2. Step 2: Convert to fraction form
    81,318/112,326.05 = 62,431.12/x
  3. Step 3: Cross multiply
    81,318x = 112,326.05 × 62,431.12
  4. Step 4: Simplify right side
    81,318x = 7,012,641,106.68
  5. Step 5: Solve for x
    x = 7,012,641,106.68/81,318
  6. Step 6: Final answer
    x = 86,237.26

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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.