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Finding the Fourth Proportional to 121,408.84, 167,162.93 and 103,223.80

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Solution

The fourth proportional to 121,408.84, 167,162.93 and 103,223.80 is: 142,124.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,408.84 : 167,162.93 = 103,223.80 : x
  2. Step 2: Convert to fraction form
    121,408.84/167,162.93 = 103,223.80/x
  3. Step 3: Cross multiply
    121,408.84x = 167,162.93 × 103,223.80
  4. Step 4: Simplify right side
    121,408.84x = 17,255,192,017.92
  5. Step 5: Solve for x
    x = 17,255,192,017.92/121,408.84
  6. Step 6: Final answer
    x = 142,124.68

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1.5x scale

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.