Home / 103,669.21-155,315.18-72,012.39

Finding the Fourth Proportional to 103,669.21, 155,315.18 and 72,012.39

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Solution

The fourth proportional to 103,669.21, 155,315.18 and 72,012.39 is: 107,887.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,669.21 : 155,315.18 = 72,012.39 : x
  2. Step 2: Convert to fraction form
    103,669.21/155,315.18 = 72,012.39/x
  3. Step 3: Cross multiply
    103,669.21x = 155,315.18 × 72,012.39
  4. Step 4: Simplify right side
    103,669.21x = 11,184,617,315.08
  5. Step 5: Solve for x
    x = 11,184,617,315.08/103,669.21
  6. Step 6: Final answer
    x = 107,887.55

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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.