Home / 81,971.52-122,968-29,386.88

Finding the Fourth Proportional to 81,971.52, 122,968 and 29,386.88

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Solution

The fourth proportional to 81,971.52, 122,968 and 29,386.88 is: 44,084.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,971.52 : 122,968 = 29,386.88 : x
  2. Step 2: Convert to fraction form
    81,971.52/122,968 = 29,386.88/x
  3. Step 3: Cross multiply
    81,971.52x = 122,968 × 29,386.88
  4. Step 4: Simplify right side
    81,971.52x = 3,613,645,859.84
  5. Step 5: Solve for x
    x = 3,613,645,859.84/81,971.52
  6. Step 6: Final answer
    x = 44,084.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.