Home / 121,469.40-167,554.26-78,381.45

Finding the Fourth Proportional to 121,469.40, 167,554.26 and 78,381.45

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Solution

The fourth proportional to 121,469.40, 167,554.26 and 78,381.45 is: 108,118.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,469.40 : 167,554.26 = 78,381.45 : x
  2. Step 2: Convert to fraction form
    121,469.40/167,554.26 = 78,381.45/x
  3. Step 3: Cross multiply
    121,469.40x = 167,554.26 × 78,381.45
  4. Step 4: Simplify right side
    121,469.40x = 13,133,145,852.48
  5. Step 5: Solve for x
    x = 13,133,145,852.48/121,469.40
  6. Step 6: Final answer
    x = 108,118.97

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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.