Home / 81,693.48-122,547.77-31,777.36

Finding the Fourth Proportional to 81,693.48, 122,547.77 and 31,777.36

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Solution

The fourth proportional to 81,693.48, 122,547.77 and 31,777.36 is: 47,668.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693.48 : 122,547.77 = 31,777.36 : x
  2. Step 2: Convert to fraction form
    81,693.48/122,547.77 = 31,777.36/x
  3. Step 3: Cross multiply
    81,693.48x = 122,547.77 × 31,777.36
  4. Step 4: Simplify right side
    81,693.48x = 3,894,244,604.49
  5. Step 5: Solve for x
    x = 3,894,244,604.49/81,693.48
  6. Step 6: Final answer
    x = 47,668.98

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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.