Home / 103,836.40-143,288.40-61,408.60

Finding the Fourth Proportional to 103,836.40, 143,288.40 and 61,408.60

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Solution

The fourth proportional to 103,836.40, 143,288.40 and 61,408.60 is: 84,740.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,836.40 : 143,288.40 = 61,408.60 : x
  2. Step 2: Convert to fraction form
    103,836.40/143,288.40 = 61,408.60/x
  3. Step 3: Cross multiply
    103,836.40x = 143,288.40 × 61,408.60
  4. Step 4: Simplify right side
    103,836.40x = 8,799,140,040.24
  5. Step 5: Solve for x
    x = 8,799,140,040.24/103,836.40
  6. Step 6: Final answer
    x = 84,740.42

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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.