Home / 103,306.48-142,610.16-79,424.80

Finding the Fourth Proportional to 103,306.48, 142,610.16 and 79,424.80

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Solution

The fourth proportional to 103,306.48, 142,610.16 and 79,424.80 is: 109,642.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,306.48 : 142,610.16 = 79,424.80 : x
  2. Step 2: Convert to fraction form
    103,306.48/142,610.16 = 79,424.80/x
  3. Step 3: Cross multiply
    103,306.48x = 142,610.16 × 79,424.80
  4. Step 4: Simplify right side
    103,306.48x = 11,326,783,435.97
  5. Step 5: Solve for x
    x = 11,326,783,435.97/103,306.48
  6. Step 6: Final answer
    x = 109,642.53

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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.